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Cheap flights from Dulles Intl (IAD) to Seattle (SEA) from $135

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
IAD — SEA
May 7 — May 141
From?
To?
Tue 5/7
Tue 5/14
1 adult, Economy
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The best prices from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl are usually found in February or January, booked 79 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Dulles Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 2, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$245

One-way from

$159
High demand for flights, 30% potential price rise
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Best time to find cheap flights, 40% potential price drop
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From Washington, D.C. Dulles Intl to Seattle/Tacoma Intl
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One-way flight from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl
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What is the cheapest day to fly round-trip from Washington, D.C. Dulles Intl Airport to Seattle?

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 25% on the overall cost on flights from Washington, D.C. Dulles Intl Airport to Seattle.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

Users have found that booking a flight from Washington, D.C. Dulles Intl Airport to Seattle at least 27 days early can save you up to 72% on average compared to booking a flight this week. If booking 27 days before your flight isn’t an option for you, users have found flights from Washington, D.C. Dulles Intl Airport to Seattle for as little as $462 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $638 for flights departing within the next 3 days.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Seattle?

January is one of the best times of the year to fly to Seattle from Washington, D.C. Dulles Intl Airport. Prices for January average $404 per person but you can even find prices for as low as $109. The most expensive prices can be found in the month of June. Opting for a January flight can save you 45% on your journey compared to booking in June

When is the cheapest time to fly from Washington, D.C. Dulles Intl Airport to Seattle (IAD - SEA)?

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 46% on airfare.

Cheap Sun Country Air flights from Dulles Intl to Seattle

Explore cheap flight options specifically provided by Sun Country Air for the route between Dulles Intl and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Check out some of the cheapest Sun Country Air flights we've come across from Washington, D.C. to Seattle. Come back soon if you're not finding the exact deal you're looking for.
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Sat 6/19:10 amSEA - IAD
1 stop8h 37mSun Country Air
Deal found 5/2$270
Fri 5/247:20 pmIAD - SEA
1 stop15h 20mSun Country Air
Sat 6/19:10 amSEA - IAD
1 stop8h 37mSun Country Air
Deal found 5/1$276
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Mon 6/35:05 pmSEA - IAD
1 stop15h 03mSun Country Air
Deal found 5/1$280
Fri 5/247:20 pmIAD - SEA
1 stop24h 50mSun Country Air
Mon 5/2711:59 pmSEA - IAD
1 stop10h 03mSun Country Air
Deal found 5/1$295
Fri 5/247:20 pmIAD - SEA
1 stop24h 50mSun Country Air
Sun 6/211:59 pmSEA - IAD
1 stop13h 32mSun Country Air
Deal found 5/2$305
Tue 7/25:50 pmIAD - SEA
1 stop17h 12mSun Country Air
Wed 7/1011:59 pmSEA - IAD
1 stop8h 18mSun Country Air
Deal found 5/1$306
Sun 6/168:00 amIAD - SEA
1 stop11h 55mSun Country Air
Mon 7/1511:59 pmSEA - IAD
1 stop10h 11mSun Country Air
Deal found 5/1$309
Fri 5/247:20 pmIAD - SEA
1 stop24h 50mSun Country Air
Mon 5/2711:59 pmSEA - IAD
1 stop10h 03mSun Country Air
Deal found 5/2$315
Fri 5/247:20 pmIAD - SEA
1 stop15h 20mSun Country Air
Mon 5/2711:59 pmSEA - IAD
1 stop10h 03mSun Country Air
Deal found 5/1$318

  • Sun Country Air is one of the most popular airlines used for those traveling from Washington, D.C. Dulles Intl Airport to Seattle. Flights on this route from Sun Country Air typically cost $376.20 RT, a price that is 72% more expensive than the average Washington, D.C. Dulles Intl Airport to Seattle flight. The cheapest flight found was $139 RT. The most popular departure airport in Washington, D.C. Dulles Intl Airport when flying to Seattle is Washington, D.C. Dulles Intl Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from Washington, D.C. Dulles Intl Airport to Seattle, Sun Country Air flights are 10% more popular than any other airline flying that same route.

Cheap Alaska Airlines flights from Dulles Intl to Seattle

Explore cheap flight options specifically provided by Alaska Airlines for the route between Dulles Intl and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Browse through some of the cheapest Alaska Airlines flights traveling from Washington, D.C. to Seattle. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Wed 5/296:10 pmIAD - SEA
Nonstop5h 40mAlaska Airlines
Tue 6/44:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/2$277
Mon 6/37:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Wed 6/511:28 pmSEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 5/1$283
Wed 5/294:19 pmIAD - SEA
1 stop30h 55mAlaska Airlines
Thu 5/3011:28 pmSEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 5/1$287
Wed 5/296:10 pmIAD - SEA
Nonstop5h 40mAlaska Airlines
Fri 6/74:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$288
Fri 5/317:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Mon 6/34:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$289
Sun 5/267:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Tue 6/45:44 pmSEA - IAD
1 stop8h 56mAlaska Airlines
Deal found 5/1$294
Wed 5/296:10 pmIAD - SEA
Nonstop5h 40mAlaska Airlines
Tue 6/43:55 pmSEA - IAD
1 stop10h 45mAlaska Airlines
Deal found 5/2$297
Fri 5/314:19 pmIAD - SEA
1 stop9h 40mAlaska Airlines
Fri 6/711:28 pmSEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 5/2$303
Sat 5/256:10 pmIAD - SEA
Nonstop5h 40mAlaska Airlines
Wed 5/299:00 amSEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 5/2$317

  • Alaska Airlines is one of the most popular airlines used for those traveling from Washington, D.C. Dulles Intl Airport to Seattle. Flights on this route from Alaska Airlines typically cost $381.20 RT, a price that is 73% cheaper than the average Washington, D.C. Dulles Intl Airport to Seattle flight. The cheapest flight found was $168 RT. Washington, D.C. Dulles Intl Airport is the most common Washington, D.C. Dulles Intl Airport airport to take off from when flying to Seattle. Seattle/Tacoma Intl Airport is the most popular arrival airport in Seattle. When flying from Washington, D.C. Dulles Intl Airport to Seattle, Alaska Airlines flights are 10% more popular than any other airline flying that same route.

Cheap Dulles Intl to Seattle flights in May & June 2024

Find cheap flight options from Dulles Intl to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Prices were last updated on May 2, 2024.
The lowest fares we've come across on flights traveling from Washington, D.C. to Seattle in May and June 2024. For more flight deals, be sure to check back very soon.
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Sat 6/19:10 amSEA - IAD
1 stop8h 37mSun Country Air
Deal found 5/2$270
Fri 5/247:20 pmIAD - SEA
1 stop15h 20mSun Country Air
Sat 6/19:10 amSEA - IAD
1 stop8h 37mSun Country Air
Deal found 5/1$276
Wed 5/297:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Tue 6/44:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$277
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Mon 6/35:05 pmSEA - IAD
1 stop15h 03mSun Country Air
Deal found 5/1$280
Wed 5/299:05 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Fri 5/3111:28 pmSEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 5/2$283
Wed 5/294:19 pmIAD - SEA
1 stop30h 55mAlaska Airlines
Thu 5/3011:28 pmSEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 5/1$287
Wed 5/296:10 pmIAD - SEA
Nonstop5h 40mAlaska Airlines
Fri 6/74:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$288
Fri 5/317:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Mon 6/34:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$289
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mMultiple Airlines
Tue 6/49:35 amSEA - IAD
2 stops21h 46mMultiple Airlines
Deal found 5/2$290

Dulles Intl to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Dulles Intl and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
The lowest fares we've come across on flights traveling from Washington, D.C. to Seattle in May and June 2024. For more flight deals, be sure to check back very soon.
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Sat 6/19:10 amSEA - IAD
1 stop8h 37mSun Country Air
Deal found 5/2$270
Fri 5/247:20 pmIAD - SEA
1 stop15h 20mSun Country Air
Sat 6/19:10 amSEA - IAD
1 stop8h 37mSun Country Air
Deal found 5/1$276
Wed 5/297:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Tue 6/44:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$277
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Mon 6/35:05 pmSEA - IAD
1 stop15h 03mSun Country Air
Deal found 5/1$280
Mon 6/37:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Wed 6/54:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$283
Wed 5/294:19 pmIAD - SEA
1 stop30h 55mAlaska Airlines
Thu 5/3011:28 pmSEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 5/1$287
Wed 5/296:10 pmIAD - SEA
Nonstop5h 40mAlaska Airlines
Fri 6/74:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$288
Fri 5/317:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Mon 6/34:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$289
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mMultiple Airlines
Tue 6/49:35 amSEA - IAD
2 stops21h 46mMultiple Airlines
Deal found 5/2$290

Non-stop flights to Seattle from Dulles Intl

Discover non-stop flight options from Dulles Intl to Seattle. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Consider booking one of these non-stop flights heading from Washington, D.C. to Seattle. Those looking to potentially save on 1 or 2-stop flights from Washington, D.C. to Seattle should utilize the search form at the the top of the page.
Wed 5/297:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Tue 6/44:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$277
Mon 6/37:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Wed 6/54:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$283
Wed 5/296:10 pmIAD - SEA
Nonstop5h 40mAlaska Airlines
Fri 6/74:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 5/1$288
Fri 5/317:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Sat 6/111:18 pmSEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 5/2$289
Sun 5/267:35 amIAD - SEA
Nonstop5h 45mDelta
Tue 6/410:22 pmSEA - IAD
Nonstop5h 04mDelta
Deal found 5/1$293
Sat 5/255:39 pmIAD - SEA
Nonstop5h 46mDelta
Sat 6/110:22 pmSEA - IAD
Nonstop5h 04mDelta
Deal found 5/1$299
Wed 6/1210:15 pmIAD - SEA
Nonstop5h 44mUnited Airlines
Wed 6/1910:25 pmSEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 5/1$305
Fri 5/2410:15 pmIAD - SEA
Nonstop5h 44mUnited Airlines
Sun 5/2610:25 pmSEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 5/1$307
Mon 6/1010:15 pmIAD - SEA
Nonstop5h 44mUnited Airlines
Sun 6/1611:29 pmSEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 5/1$310

Dulles Intl to Seattle flights leaving soon

Find last-minute flight options from Dulles Intl to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Check out these flights departing soon from Washington, D.C. to Seattle. It's wise to confirm all flight details are correct before booking.
Thu 5/91:25 pmIAD - SEA
1 stop29h 45mSun Country Air
Sat 5/116:15 pmSEA - IAD
1 stop14h 52mSun Country Air
Deal found 5/1$365
Wed 5/85:02 amIAD - SEA
1 stop9h 06mAmerican Airlines
Fri 5/1011:43 pmSEA - IAD
1 stop8h 09mAmerican Airlines
Deal found 5/1$373
Wed 5/85:02 amIAD - SEA
2 stops10h 24mAmerican Airlines
Wed 5/1510:05 pmSEA - IAD
1 stop7h 49mAmerican Airlines
Deal found 5/1$378
Wed 5/82:14 pmIAD - SEA
2 stops11h 51mAmerican Airlines
Tue 5/141:15 amSEA - IAD
2 stops10h 42mAmerican Airlines
Deal found 5/1$383
Thu 5/91:25 pmIAD - SEA
2 stops22h 20mMultiple Airlines
Sat 5/116:15 pmSEA - IAD
1 stop14h 52mMultiple Airlines
Deal found 5/1$444
Thu 5/93:27 pmIAD - SEA
1 stop10h 14mAmerican Airlines
Sun 5/1210:05 pmSEA - IAD
1 stop7h 49mAmerican Airlines
Deal found 5/1$449
Thu 5/98:25 amIAD - SEA
3 stops27h 20mMultiple Airlines
Sat 5/116:15 pmSEA - IAD
1 stop14h 52mMultiple Airlines
Deal found 5/1$479
Wed 5/87:09 pmIAD - SEA
Nonstop5h 51mMultiple Airlines
Wed 5/155:45 pmSEA - IAD
1 stop14h 02mMultiple Airlines
Deal found 5/1$486
Fri 5/103:27 pmIAD - SEA
1 stop10h 14mAmerican Airlines
Mon 5/1311:43 pmSEA - IAD
1 stop8h 32mAmerican Airlines
Deal found 5/1$494

One-way flights to Seattle from Dulles Intl

Search for one-way flight options from Dulles Intl to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Users in need of a one-way flight from Washington, D.C. to Seattle can choose from these deals. Those seeking round-trip flights from Washington, D.C. to Seattle should utilize the search form at the the top of the page.
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Deal found 5/1$135
Fri 5/316:20 pmIAD - SEA
1 stop7h 30mSun Country Air
Deal found 5/1$138
Wed 6/57:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Deal found 5/2$139
Wed 5/297:35 amIAD - SEA
Nonstop5h 45mDelta
Deal found 5/1$144
Fri 5/317:00 amIAD - SEA
Nonstop5h 30mAlaska Airlines
Deal found 5/1$145
Tue 7/25:50 pmIAD - SEA
1 stop17h 12mSun Country Air
Deal found 5/2$146
Wed 7/1011:27 amIAD - SEA
1 stop14h 26mSun Country Air
Deal found 5/1$149
Fri 5/317:35 amIAD - SEA
Nonstop5h 45mDelta
Deal found 5/1$150
Mon 7/227:05 pmIAD - SEA
1 stop24h 54mSun Country Air
Deal found 5/2$153

Find flights from Dulles Intl to Seattle within your budget

Customize your flight search to find flights from Dulles Intl to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$270 - $310

Route

Depart

Return

Price

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 5/31

1 stop7h 30m

Seattle/Tacoma Intl

Sat 6/1

1 stop8h 37m

$270

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 5/24

1 stop15h 20m

Seattle/Tacoma Intl

Sat 6/1

1 stop8h 37m

$276

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 5/29

Nonstop5h 40m

Seattle/Tacoma Intl

Tue 6/4

Nonstop4h 59m

$277

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 6/3

Nonstop5h 30m

Seattle/Tacoma Intl

Wed 6/5

Nonstop5h 12m

$283

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 5/31

1 stop7h 30m

Seattle/Tacoma Intl

Tue 6/4

2 stops21h 46m

$290

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 5/31

1 stop16h 40m

Seattle/Tacoma Intl

Mon 6/3

Nonstop4h 59m

$291

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 6/3

Nonstop5h 44m

Seattle/Tacoma Intl

Wed 6/5

1 stop9h 17m

$292

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sun 5/26

Nonstop5h 45m

Seattle/Tacoma Intl

Tue 6/4

Nonstop5h 04m

$293

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 9/10

2 stops11h 40m

Seattle/Tacoma Intl

Tue 9/17

1 stop10h 44m

$310

Flights are sorted by cheapest first

Deals found on 5/2

When is the best time to book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Seattle. Price data was last updated on January 28, 2024.
The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 79 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from Washington, D.C. Dulles Intl Airport to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Seattle. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Seattle flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Seattle by month

Plan your trip from Dulles Intl to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from Dulles Intl to Seattle is currently $144 while a round-trip flight costs $287. Price data was last updated on April 28, 2024.

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seattle (average of $245). Flying from Washington, D.C. Dulles Intl Airport to Seattle in July is currently the most expensive (average of $408). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$247

February

$254

March

$288

April

$294

May

$320

June

$406

July

$408

August

$343

September

$278

October

$257

November

$258

December

$245

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated May 2, 2024.
Get a feel of what it's like to fly with Sun Country Air, Alaska Airlines and United Airlines from Washington, D.C. to Seattle by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Alaska Airlines
8.1
Very good
9,123 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Delta
8.1
Very good
10,858 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

United Airlines
7.4
Good
11,143 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

American Airlines
7.3
Good
14,767 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Sun Country Air
7.3
Good
649 reviews
Alaska Airlines
8.1
Very good
9,123 reviews
Check prices

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Washington, D.C. Dulles Intl?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Seattle. 6 airlines have flights to Seattle/Tacoma Intl from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 13 inbound flights from Washington, D.C. Dulles Intl per day.

  • Can I find flights from Washington, D.C. Dulles Intl Airport to Seattle for under $300 on Cheapflights?

    Yes, there are multiple flights from Washington, D.C. Dulles Intl Airport to Seattle for under $300. The cheapest flight booked recently is on Sun Country Air for just $270, but on average you can expect to pay $289.

  • Are there nonstop flights from Washington, D.C. Dulles Intl Airport to Seattle for under $300 on Cheapflights?

    Cheapflights has at least 20 direct flights from Washington, D.C. Dulles Intl Airport to Seattle under $300. A good price for a nonstop flight from Washington, D.C. Dulles Intl Airport to Seattle is less than $313.

  • Are there last-minute flights available from Washington, D.C. Dulles Intl Airport to Seattle for under $400?

    There are currently 20+ open flights from Washington, D.C. Dulles Intl Airport to Seattle within the next 7 days for less than $400.

  • What days are nonstop flights available from Washington, D.C. Dulles Intl Airport to Seattle?

    Nonstop flights can be found on the following days: Sunday, Monday, Tuesday, Thursday, Friday, Saturday.

  • How many flights depart from Washington, D.C. Dulles Intl Airport to Seattle on average per day?

    Per day, 15 flights depart from Washington, D.C. Dulles Intl Airport to Seattle on average.
    Morning (6am - Noon) - 40% of flight departures
    Afternoon (Noon - 6pm) - 47% of flight departures
    Evening (6pm - Midnight) - 13% of flight departures

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Seattle?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Seattle in 5h 40m. Fly via Sun Country Air, Alaska Airlines, or United Airlines to get the fastest option. Airlines will cover a distance of 2313 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Seattle round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Seattle round-trip from $270. Other airlines that can offer you cheap pricing are Alaska Airlines, from $277, and United Airlines, from $292. Sun Country Air is currently priced 32% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Seattle one-way?

    To fly one-way, consider booking your trip with Sun Country Air, which is currently one of the cheapest options available, starting at $135. Alaska Airlines flights start at $139 while deals on Delta start at $144 one-way.

  • What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to Seattle?

    When booking a flight from Washington, D.C. Dulles Intl Airport to Seattle, you may want to consider flying on Undisclosed Carrier, American Airlines or Alaska Airlines as they are the most popular for this route.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Seattle?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Seattle are Air Tahiti Nui (93%), Japan Airlines (92%) and United Airlines (91%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Seattle?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Seattle is $144. On average you can expect to pay $804. The most popular route, (Washington, D.C. Dulles Intl - Seattle/Tacoma Intl), can usually be booked for $270.

  • What does IAD to SEA mean?

    Great question - IAD to SEA just means Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from Dulles Intl to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Dulles Intl to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Dulles Intl to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Dulles Intl to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Dulles Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Seattle.

  • Can I find deals for business class flights from Dulles Intl to Seattle?

    Yes. Cheapflights offers flight deals from Dulles Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Dulles Intl to Seattle that allow pets onboard?

    Many airlines flying from Dulles Intl to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Dulles Intl to Seattle?

    Yes, you can often find last-minute deals on Dulles Intl to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Washington, D.C. Dulles Intl Airport to Seattle flight deals updated?

    The Washington, D.C. Dulles Intl Airport to Seattle flight deals you see on this page were last updated on 5/2.

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Alternative routes for Dulles Intl to Seattle
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from Dulles Intl to Seattle

Discover the top 5 airlines that operate flights from Dulles Intl to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$139Average$376FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapest$168Average$381FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
FrontierCheapest$188Average$266FlexibilityNo cancel feeOn-time62%
Search Frontier flights
United AirlinesCheapest$194Average$440FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$254Average$528FlexibilityNo cancel feeOn-time71%
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Search flights from Dulles Intl to Seattle by cabin class

Find flights from Dulles Intl to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Dulles Intl to Seattle

Find hourly flight availability from Dulles Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 2, 2024.
1%of flight departuresEarly morningMidnight to 6 am
11%of flight departuresMorning6 am to noon
80%of flight departuresAfternoonNoon to 6 pm
8%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Dulles Intl to Seattle

Explore weekly flight availability from Dulles Intl to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 2, 2024.
Sunday14daily flights
Monday14daily flights
Tuesday11daily flights
Wednesday13daily flights
Thursday12daily flights
Friday15daily flights
Saturday14daily flights

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Fly with Cheapflights

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How does Cheapflights help users find flights from Dulles Intl to Seattle?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Dulles Intl to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Dulles Intl to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Dulles Intl to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Dulles Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl to Seattle become cheaper?

Yes! Start tracking prices for Dulles Intl to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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