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Cheap flights from Ontario (ONT) to Dulles Intl (IAD) from $144

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 7/9. 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.
ONT — IAD
May 14 — May 211
From?
To?
Tue 5/14
Tue 5/21
1 adult, Economy
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The best prices from Ontario to Washington, D.C. Dulles Intl are usually found in January or February, booked 60 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Ontario to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Dulles Intl (IAD). 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 9, 2024.

Popular in

June

Cheapest in

January

Average price

$398

Round-trip from

$235
High demand for flights, 49% potential price rise
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Best time to find cheap flights, 54% potential price drop
Search Deals
Average for round-trip flights in May 2024
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From Ontario to Washington, D.C. Dulles Intl
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What is the cheapest day to fly round-trip from Ontario to Washington, D.C. Dulles Intl Airport?

Flying to your destination on a Saturday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Washington, D.C. Dulles Intl Airport. Check prices with Cheapflights to find a great deal for your trip.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 29 days in advance, which can save you up to 69% on flights from Ontario to Washington, D.C. Dulles Intl Airport compared to booking the week you need them. Waiting 29 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $375. For sooner than that we have options available in the next 3 days from $601.

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

Flights from Ontario to Washington, D.C. Dulles Intl Airport lean towards being more expensive in June. Prices are generally better when you fly from Ontario to Washington, D.C. Dulles Intl Airport in September, with the cheapest ticket starting at $109.

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

A simple way to save on the total cost of your ticket is to fly from Ontario to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight at noon.

Cheap Delta flights from Ontario to Dulles Intl

Explore cheap flight options specifically provided by Delta for the route between Ontario and Dulles Intl. 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 2,752,338 searches. Data last updated May 9, 2024.
Take a peek at the cheapest Delta flights we've detected traveling from Ontario to Washington, D.C.. Make sure to double check the flight details before booking.
Sat 5/2512:50 pmONT - IAD
1 stop8h 05mDelta
Tue 5/282:59 pmIAD - ONT
1 stop8h 07mDelta
Deal found 5/8$300
Tue 7/1610:00 pmONT - IAD
1 stop8h 19mDelta
Tue 7/236:00 amIAD - ONT
1 stop7h 54mDelta
Deal found 5/8$309
Sat 5/2512:50 pmONT - IAD
1 stop8h 05mDelta
Wed 6/57:15 amIAD - ONT
1 stop7h 58mDelta
Deal found 5/8$319
Wed 5/291:20 pmONT - IAD
1 stop7h 33mDelta
Wed 6/56:00 amIAD - ONT
2 stops9h 13mDelta
Deal found 5/8$324
Tue 7/1610:00 pmONT - IAD
1 stop8h 19mDelta
Wed 7/246:00 amIAD - ONT
1 stop7h 54mDelta
Deal found 5/8$328
Wed 5/296:42 pmONT - IAD
2 stops13h 23mDelta
Wed 6/56:00 amIAD - ONT
2 stops9h 13mDelta
Deal found 5/8$329
Fri 6/76:30 pmONT - IAD
1 stop8h 30mDelta
Thu 6/137:15 amIAD - ONT
1 stop8h 02mDelta
Deal found 5/8$334
Wed 7/3110:00 pmONT - IAD
1 stop8h 19mDelta
Thu 8/87:30 amIAD - ONT
1 stop7h 53mDelta
Deal found 5/8$344
Wed 7/1710:00 pmONT - IAD
1 stop8h 19mDelta
Wed 7/246:00 amIAD - ONT
1 stop7h 54mDelta
Deal found 5/8$353

Cheap United Airlines flights from Ontario to Dulles Intl

Explore cheap flight options specifically provided by United Airlines for the route between Ontario and Dulles Intl. 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 2,752,338 searches. Data last updated May 9, 2024.
Browse through some of the cheapest United Airlines flights traveling from Ontario to Washington, D.C.. Check back soon if you're not seeing flights that suit your needs.
Wed 5/226:00 amONT - IAD
1 stop7h 20mUnited Airlines
Wed 5/294:10 pmIAD - ONT
1 stop7h 38mUnited Airlines
Deal found 5/8$290
Fri 5/246:25 pmONT - IAD
1 stop8h 00mUnited Airlines
Mon 5/277:00 amIAD - ONT
1 stop8h 45mUnited Airlines
Deal found 5/8$362
Fri 5/246:25 pmONT - IAD
1 stop8h 00mUnited Airlines
Sat 5/252:23 pmIAD - ONT
1 stop11h 04mUnited Airlines
Deal found 5/8$390
Sat 6/296:25 pmONT - IAD
1 stop8h 00mUnited Airlines
Wed 7/32:36 pmIAD - ONT
1 stop11h 09mUnited Airlines
Deal found 5/8$414
Tue 5/215:15 amONT - IAD
1 stop7h 23mUnited Airlines
Tue 5/282:23 pmIAD - ONT
1 stop11h 06mUnited Airlines
Deal found 5/8$417
Tue 5/281:50 pmONT - IAD
1 stop8h 04mUnited Airlines
Fri 5/312:23 pmIAD - ONT
1 stop11h 06mUnited Airlines
Deal found 5/8$419
Sun 5/265:55 amONT - IAD
1 stop7h 25mUnited Airlines
Sat 6/82:23 pmIAD - ONT
1 stop11h 04mUnited Airlines
Deal found 5/8$424
Fri 6/286:25 pmONT - IAD
1 stop8h 00mUnited Airlines
Thu 7/47:01 amIAD - ONT
1 stop8h 14mUnited Airlines
Deal found 5/9$434
Mon 5/275:15 amONT - IAD
1 stop7h 13mUnited Airlines
Thu 5/3010:58 amIAD - ONT
1 stop9h 30mUnited Airlines
Deal found 5/8$437

Cheap Ontario to Dulles Intl flights in May & June 2024

Find cheap flight options from Ontario to Dulles Intl specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Prices were last updated on May 9, 2024.
These are some of the best deals we've found on flights to Washington, D.C. in 2024 at this time. More deals are always being added, so be sure to check back regularly.
Wed 5/226:00 amONT - IAD
1 stop7h 20mUnited Airlines
Wed 5/294:10 pmIAD - ONT
1 stop7h 38mUnited Airlines
Deal found 5/8$290
Sat 5/2512:50 pmONT - IAD
1 stop8h 05mDelta
Sat 6/17:00 amIAD - ONT
1 stop7h 39mDelta
Deal found 5/8$300
Sat 5/2512:50 pmONT - IAD
1 stop8h 05mDelta
Wed 6/57:15 amIAD - ONT
1 stop7h 58mDelta
Deal found 5/8$319
Wed 5/291:20 pmONT - IAD
1 stop7h 33mDelta
Wed 6/56:00 amIAD - ONT
2 stops9h 13mDelta
Deal found 5/8$324
Wed 5/296:42 pmONT - IAD
2 stops13h 23mDelta
Wed 6/56:00 amIAD - ONT
2 stops9h 13mDelta
Deal found 5/8$329
Fri 6/76:30 pmONT - IAD
1 stop8h 30mDelta
Tue 6/117:15 amIAD - ONT
1 stop8h 02mDelta
Deal found 5/8$334
Fri 6/711:59 pmONT - IAD
2 stops9h 44mAmerican Airlines
Tue 6/115:43 pmIAD - ONT
1 stop8h 16mAmerican Airlines
Deal found 5/8$341
Fri 6/711:59 pmONT - IAD
2 stops9h 44mAmerican Airlines
Tue 6/115:00 amIAD - ONT
2 stops11h 48mAmerican Airlines
Deal found 5/8$346
Fri 5/311:20 pmONT - IAD
1 stop7h 33mDelta
Mon 6/37:15 amIAD - ONT
1 stop7h 58mDelta
Deal found 5/7$358

Ontario to Dulles Intl 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Dulles Intl in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
These are some of the best deals we've found on flights to Washington, D.C. in 2024 at this time. More deals are always being added, so be sure to check back regularly.
Sat 9/711:00 pmONT - IAD
1 stop6h 36mAmerican Airlines
Tue 9/105:31 pmIAD - ONT
1 stop7h 29mAmerican Airlines
Deal found 5/9$287
Wed 5/226:00 amONT - IAD
1 stop7h 20mUnited Airlines
Wed 5/294:10 pmIAD - ONT
1 stop7h 38mUnited Airlines
Deal found 5/8$290
Sat 9/2811:00 pmONT - IAD
1 stop6h 36mAmerican Airlines
Tue 10/12:05 pmIAD - ONT
2 stops10h 39mAmerican Airlines
Deal found 5/8$292
Mon 8/127:23 pmONT - IAD
2 stops10h 21mAmerican Airlines
Sat 8/171:10 pmIAD - ONT
1 stop10h 11mAmerican Airlines
Deal found 5/9$293
Thu 8/17:16 pmONT - IAD
2 stops10h 38mAmerican Airlines
Tue 8/65:29 pmIAD - ONT
1 stop7h 34mAmerican Airlines
Deal found 5/8$295
Mon 8/127:23 pmONT - IAD
2 stops10h 21mAmerican Airlines
Sat 8/179:14 amIAD - ONT
2 stops12h 34mAmerican Airlines
Deal found 5/9$298
Sat 5/2512:50 pmONT - IAD
1 stop8h 05mDelta
Sat 6/17:00 amIAD - ONT
1 stop7h 39mDelta
Deal found 5/8$300
Tue 7/1610:00 pmONT - IAD
1 stop8h 19mDelta
Tue 7/236:00 amIAD - ONT
1 stop7h 54mDelta
Deal found 5/8$309
Sat 5/2512:50 pmONT - IAD
1 stop8h 05mDelta
Wed 6/57:15 amIAD - ONT
1 stop7h 58mDelta
Deal found 5/8$319

Ontario to Dulles Intl flights leaving soon

Find last-minute flight options from Ontario to Dulles Intl 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 2,752,338 searches. Data last updated May 9, 2024.
Book one of these great deals on flights from Ontario to Washington, D.C.. Users should examine the flight details to ensure there are no surprises.
Sat 5/181:20 pmONT - IAD
1 stop7h 33mDelta
Sat 6/86:00 amIAD - ONT
1 stop7h 20mDelta
Deal found 5/8$417
Sat 5/181:20 pmONT - IAD
1 stop7h 33mDelta
Sun 5/262:59 pmIAD - ONT
1 stop8h 07mDelta
Deal found 5/7$427
Tue 5/1410:29 pmONT - IAD
1 stop9h 46mAmerican Airlines
Sat 8/171:10 pmIAD - ONT
1 stop10h 11mAmerican Airlines
Deal found 5/8$454
Tue 5/1410:29 pmONT - IAD
1 stop9h 46mAmerican Airlines
Sat 8/179:14 amIAD - ONT
2 stops12h 10mAmerican Airlines
Deal found 5/8$459
Tue 5/146:50 amONT - IAD
2 stops13h 02mDelta
Sat 8/176:00 amIAD - ONT
1 stop8h 10mDelta
Deal found 5/8$462
Tue 5/147:40 pmONT - IAD
2 stops12h 35mAmerican Airlines
Sat 8/175:03 amIAD - ONT
2 stops11h 42mAmerican Airlines
Deal found 5/8$465
Tue 5/146:42 pmONT - IAD
1 stop8h 43mDelta
Tue 5/216:00 amIAD - ONT
1 stop8h 40mDelta
Deal found 5/8$491
Tue 5/146:50 amONT - IAD
2 stops13h 02mDelta
Tue 5/216:00 amIAD - ONT
1 stop8h 40mDelta
Deal found 5/8$496
Tue 5/146:50 amONT - IAD
2 stops13h 02mDelta
Tue 5/216:00 amIAD - ONT
2 stops9h 13mDelta
Deal found 5/8$516

One-way flights to Dulles Intl from Ontario

Search for one-way flight options from Ontario to Dulles Intl. 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 2,752,338 searches. Data last updated May 9, 2024.
Users traveling one-way from Ontario to Washington, D.C. can select one of these great deals. Users can also find round-trip Ontario to Washington, D.C. flights by using the search form above.
Tue 7/910:36 pmONT - IAD
1 stop7h 18mAmerican Airlines
Deal found 5/9$144
Wed 6/512:50 pmONT - IAD
1 stop8h 05mDelta
Deal found 5/9$145
Tue 6/2510:00 pmONT - IAD
1 stop7h 45mDelta
Deal found 5/8$150
Thu 7/115:00 pmONT - IAD
2 stops13h 19mDelta
Deal found 5/8$155
Tue 6/117:26 pmONT - IAD
2 stops10h 32mAmerican Airlines
Deal found 5/8$159
Fri 5/3110:29 pmONT - IAD
1 stop9h 23mAmerican Airlines
Deal found 5/7$173
Sat 6/1510:45 pmONT - IAD
1 stop7h 13mAmerican Airlines
Deal found 5/8$183
Fri 6/76:30 pmONT - IAD
1 stop8h 30mDelta
Deal found 5/8$184
Tue 5/285:20 pmONT - IAD
2 stops12h 47mDelta
Deal found 5/8$189

Find flights from Ontario to Dulles Intl within your budget

Customize your flight search to find flights from Ontario to Dulles Intl 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 2,752,338 searches. Data last updated May 9, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$287 - $457

Route

Depart

Return

Price

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Sat 9/7

1 stop6h 36m

Washington, D.C. Dulles Intl

Tue 9/10

1 stop7h 29m

$287

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Wed 5/22

1 stop7h 20m

Washington, D.C. Dulles Intl

Wed 5/29

1 stop7h 38m

$290

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Sat 9/28

1 stop6h 36m

Washington, D.C. Dulles Intl

Tue 10/1

2 stops10h 39m

$292

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Mon 8/12

2 stops10h 21m

Washington, D.C. Dulles Intl

Sat 8/17

1 stop10h 11m

$293

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Thu 8/1

2 stops10h 38m

Washington, D.C. Dulles Intl

Tue 8/6

1 stop7h 34m

$295

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Sat 5/25

1 stop8h 05m

Washington, D.C. Dulles Intl

Tue 5/28

1 stop8h 07m

$300

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Tue 7/16

1 stop8h 19m

Washington, D.C. Dulles Intl

Tue 7/23

1 stop7h 54m

$309

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Sat 5/25

1 stop8h 05m

Washington, D.C. Dulles Intl

Wed 6/5

1 stop7h 58m

$319

OntarioWashington, D.C. Dulles Intl

ONT - IAD

ONTIAD

Ontario

Wed 5/29

1 stop12h 19m

Washington, D.C. Dulles Intl

Tue 6/4

1 stop13h 09m

$457

Flights are sorted by cheapest first

Deals found on 5/9

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Dulles Intl. Price data was last updated on May 3, 2024.
The price you pay for your flight from Ontario to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 60 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 Ontario to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Dulles Intl. Price data was last updated on May 5, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday 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 Dulles Intl by month

Plan your trip from Ontario to Dulles Intl by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to Dulles Intl is currently $165 while a round-trip flight costs $316. Price data was last updated on May 5, 2024.

Currently, September is the cheapest month in which you can book a flight from Ontario to Washington, D.C. Dulles Intl Airport (average of $279). Flying from Ontario to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $395). 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

$308

February

$303

March

$358

April

$337

May

$339

June

$395

July

$376

August

$297

September

$279

October

$303

November

$328

December

$292

Temperature and rainfall in Dulles Intl by month

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

WAS

Temperature

35.6 - 80.6 °F

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated May 9, 2024.
Read reviews from past customers who have flown Delta, United Airlines and Alaska Airlines from Ontario to Washington, D.C.. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,072 reviews
Check prices

Boarding

8.3

Food

7.3

Comfort

8.1

Entertainment

7.8

Crew

8.7

Overall

8.2

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Southwest
8.2
Very good
6,072 reviews
Southwest
8.2
Very good
6,072 reviews
Check prices

Boarding

8.3

Food

7.3

Comfort

8.1

Entertainment

7.8

Crew

8.7

Overall

8.2

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Alaska Airlines
8.1
Very good
9,141 reviews
Southwest
8.2
Very good
6,072 reviews
Check prices

Boarding

8.3

Food

7.3

Comfort

8.1

Entertainment

7.8

Crew

8.7

Overall

8.2

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Delta
8.1
Very good
10,789 reviews
Southwest
8.2
Very good
6,072 reviews
Check prices

Boarding

8.3

Food

7.3

Comfort

8.1

Entertainment

7.8

Crew

8.7

Overall

8.2

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Avianca
7.5
Good
3,823 reviews
Southwest
8.2
Very good
6,072 reviews
Check prices

Boarding

8.3

Food

7.3

Comfort

8.1

Entertainment

7.8

Crew

8.7

Overall

8.2

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

United Airlines
7.4
Good
11,043 reviews
Southwest
8.2
Very good
6,072 reviews
Check prices

Boarding

8.3

Food

7.3

Comfort

8.1

Entertainment

7.8

Crew

8.7

Overall

8.2

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Dulles Intl. 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 from for flights from Ontario to Washington, D.C. Dulles Intl?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to Washington, D.C. Dulles Intl. On average, Ontario has 0 outbound flights to Washington, D.C. Dulles Intl per day from 5 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    Yes, there are multiple flights from Ontario to Washington, D.C. Dulles Intl Airport for under $300. The cheapest flight booked recently is on American Airlines for just $287, but on average you can expect to pay $314.

  • Are there last-minute flights available from Ontario to Washington, D.C. Dulles Intl Airport for under $500?

    There are currently 20+ open flights from Ontario to Washington, D.C. Dulles Intl Airport within the next 7 days for less than $500.

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

    Cheapflights users have booked flights from Ontario to Washington, D.C. Dulles Intl Airport round-trip from $287. Other airlines that can offer you cheap pricing are United Airlines, from $290, and Delta, from $300. Users have found that American Airlines is 31% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $144. Delta flights start at $145 while deals on United Airlines start at $195 one-way.

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

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

  • What does ONT to IAD mean?

    ONT and IAD are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ONT to IAD refers to a flight route from Ontario Airport to Washington, D.C. Dulles Intl Airport.

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

    The amount of baggage you can bring on your Ontario to Dulles Intl 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 Ontario to Dulles Intl with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Dulles Intl 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 Ontario to Dulles Intl that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Dulles Intl 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 Ontario to Dulles Intl that allow pets onboard?

    Many airlines flying from Ontario to Dulles Intl 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 Ontario to Dulles Intl?

    Yes, you can often find last-minute deals on Ontario to Dulles Intl 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 Ontario to Washington, D.C. Dulles Intl Airport flight deals updated?

    The Ontario to Washington, D.C. Dulles Intl Airport flight deals you see on this page were last updated on 5/9.

See more FAQs

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

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Top 5 airlines flying from Ontario to Dulles Intl

Discover the top 5 airlines that operate flights from Ontario to Dulles Intl. 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 2,752,338 searches. Data last updated May 9, 2024.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$133Average$265FlexibilityNo cancel feeOn-time75%
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FrontierCheapest$156Average$221FlexibilityNo cancel feeOn-time62%
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United AirlinesCheapest$186Average$519FlexibilityNo cancel feeOn-time69%
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American AirlinesCheapest$193Average$445FlexibilityNo cancel feeOn-time71%
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DeltaCheapest$256Average$389FlexibilityNo cancel feeOn-timeN/A
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Search flights from Ontario to Dulles Intl by cabin class

Find flights from Ontario to Dulles Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Dulles Intl. 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 Ontario to Dulles Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from Ontario.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to Dulles Intl, users can toggle the no change fees filter when performing a flight search.

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

Yes! Start tracking prices for Ontario to Dulles Intl 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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