HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Illinois to Seattle (SEA) from $64

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 6/11. 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.
ORD — SEA
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

How far in advance should I book a flight from Illinois to Seattle?

Users have found that booking a flight from Illinois to Seattle at least 50 days early can save you up to 106% on average compared to booking a flight this week. If booking 50 days before your flight isn’t an option for you, users have found flights from Illinois to Seattle for as little as $322 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 $578 for flights departing within the next 3 days.

What is the cheapest month to fly from Illinois to Seattle?

January can be a great time to fly to Seattle from Illinois with a flight ticket averaging about $271. Cheapflights users have found deals in the month of January for as cheap as $97. The most expensive prices can be found in the month of July.

When is the cheapest time to fly from Illinois to Seattle (IL - SEA)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Seattle as you normally would.

Cheap United Airlines flights from Illinois to Seattle

Explore cheap flight options specifically provided by United Airlines for the route between Illinois 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 2,637,452 searches. Data last updated May 16, 2024.
Check out some of the cheapest United Airlines flights we've come across from Illinois to Seattle. Deals update often to give you more flight options matching your criteria
Wed 9/47:15 amORD - SEA
Nonstop4h 33mUnited Airlines
Tue 9/107:00 amSEA - ORD
Nonstop4h 05mUnited Airlines
Deal found 5/15$149
Wed 9/47:15 amORD - SEA
Nonstop4h 33mUnited Airlines
Tue 9/1012:55 pmSEA - ORD
1 stop9h 45mUnited Airlines
Deal found 5/15$154
Wed 8/146:30 pmORD - SEA
Nonstop4h 39mUnited Airlines
Tue 8/2012:55 pmSEA - ORD
1 stop9h 45mUnited Airlines
Deal found 5/14$244
Sat 5/257:45 pmORD - SEA
Nonstop4h 38mUnited Airlines
Thu 5/3012:25 amSEA - ORD
Nonstop3h 56mUnited Airlines
Deal found 5/16$384
Sat 5/256:15 pmORD - SEA
1 stop6h 35mUnited Airlines
Thu 5/3012:25 amSEA - ORD
Nonstop3h 56mUnited Airlines
Deal found 5/16$394

Cheap American Airlines flights from Illinois to Seattle

Explore cheap flight options specifically provided by American Airlines for the route between Illinois 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 2,637,452 searches. Data last updated May 16, 2024.
To aid your search, here are some of the cheapest American Airlines flights we've found from Illinois to Seattle. Deals frequently update to provide users with more options.
Wed 9/186:25 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Tue 9/2411:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/15$150
Wed 9/186:25 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Tue 9/2411:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/16$151
Fri 9/68:20 amORD - SEA
Nonstop4h 33mAmerican Airlines
Tue 9/1011:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/15$181
Sat 10/55:37 amSTL - SEA
1 stop8h 08mAmerican Airlines
Tue 10/811:59 pmSEA - STL
1 stop8h 05mAmerican Airlines
Deal found 5/15$195
Tue 8/204:18 pmSTL - SEA
1 stop9h 17mAmerican Airlines
Mon 8/2612:18 amSEA - STL
1 stop6h 46mAmerican Airlines
Deal found 5/15$198
Sat 5/253:20 pmORD - SEA
1 stop8h 36mAmerican Airlines
Wed 6/510:52 pmSEA - ORD
Nonstop4h 15mAmerican Airlines
Deal found 5/14$272
Sat 5/253:20 pmORD - SEA
1 stop8h 36mAmerican Airlines
Fri 5/3111:59 pmSEA - ORD
Nonstop4h 12mAmerican Airlines
Deal found 5/15$302
Thu 5/237:01 amSTL - SEA
1 stop9h 35mAmerican Airlines
Wed 5/291:15 amSEA - STL
1 stop7h 22mAmerican Airlines
Deal found 5/16$305
Fri 5/248:27 pmORD - SEA
Nonstop4h 38mAmerican Airlines
Tue 6/411:55 pmSEA - ORD
Nonstop4h 12mAmerican Airlines
Deal found 5/15$318

Cheap Illinois to Seattle flights in May & June 2024

Find cheap flight options from Illinois 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 2,637,452 searches. Prices were last updated on May 16, 2024.
The lowest fares we've come across on flights traveling from Illinois to Seattle in May and June 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Tue 6/410:44 pmSTL - SEA
1 stop10h 17mMultiple Airlines
Tue 6/119:41 pmSEA - STL
1 stop13h 24mMultiple Airlines
Deal found 5/15$139
Mon 6/34:05 pmSTL - SEA
1 stop18h 40mMultiple Airlines
Thu 6/610:58 pmSEA - STL
1 stop9h 44mMultiple Airlines
Deal found 5/16$166
Wed 5/2911:31 amMDW - SEA
1 stop9h 54mFrontier
Tue 6/119:41 amSEA - MDW
1 stop24h 19mFrontier
Deal found 5/15$169
Wed 5/296:45 pmORD - SEA
1 stop15h 45mFrontier
Tue 6/119:41 amSEA - ORD
1 stop12h 59mFrontier
Deal found 5/15$169
Thu 5/307:23 pmSTL - SEA
1 stop26h 41mFrontier
Mon 6/109:49 pmSEA - STL
1 stop10h 53mFrontier
Deal found 5/16$169
Thu 6/65:01 amMDW - SEA
1 stop7h 25mFrontier
Mon 6/109:49 pmSEA - MDW
1 stop28h 44mFrontier
Deal found 5/15$170
Sat 6/810:11 pmORD - SEA
1 stop12h 59mFrontier
Tue 6/119:41 amSEA - ORD
1 stop12h 59mFrontier
Deal found 5/15$170
Mon 6/310:21 pmSTL - SEA
1 stop13h 34mFrontier
Thu 6/610:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 5/14$170
Thu 5/308:55 pmMDW - SEA
1 stop25h 09mFrontier
Tue 6/48:14 pmSEA - MDW
1 stop13h 46mFrontier
Deal found 5/15$171

Illinois to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Illinois and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
The lowest fares we've come across on flights traveling from Illinois to Seattle in May and June 2024. If these deals don't appeal to you, be sure to come back soon for more options.
Tue 6/410:44 pmSTL - SEA
1 stop10h 17mMultiple Airlines
Tue 6/119:41 pmSEA - STL
1 stop13h 24mMultiple Airlines
Deal found 5/15$139
Wed 9/47:15 amORD - SEA
Nonstop4h 33mUnited Airlines
Tue 9/107:00 amSEA - ORD
Nonstop4h 05mUnited Airlines
Deal found 5/15$149
Wed 9/186:25 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Tue 9/2411:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/15$150
Wed 9/186:25 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Tue 9/2411:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/16$151
Wed 9/47:15 amORD - SEA
Nonstop4h 33mUnited Airlines
Tue 9/1012:55 pmSEA - ORD
1 stop9h 45mUnited Airlines
Deal found 5/15$154
Wed 9/46:00 amORD - SEA
Nonstop4h 34mMultiple Airlines
Tue 9/109:37 amSEA - ORD
1 stop8h 44mMultiple Airlines
Deal found 5/15$165
Tue 8/206:00 amMDW - SEA
1 stop28h 37mFrontier
Wed 8/287:51 pmSEA - MDW
1 stop8h 42mFrontier
Deal found 5/14$166
Tue 9/38:00 amORD - SEA
1 stop26h 37mFrontier
Tue 9/109:37 amSEA - ORD
1 stop8h 44mFrontier
Deal found 5/15$166
Mon 6/34:05 pmSTL - SEA
1 stop18h 40mMultiple Airlines
Thu 6/610:58 pmSEA - STL
1 stop9h 44mMultiple Airlines
Deal found 5/16$166

Non-stop flights to Seattle from Illinois

Discover non-stop flight options from Illinois 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 2,637,452 searches. Data last updated May 16, 2024.
If you're seeking options on non-stop flights from Illinois to Seattle, check out these fares. Search for alternative flights from Illinois to Seattle by utilizing the search form above.
Wed 9/47:15 amORD - SEA
Nonstop4h 33mUnited Airlines
Tue 9/107:00 amSEA - ORD
Nonstop4h 05mUnited Airlines
Deal found 5/15$149
Wed 9/186:25 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Tue 9/2411:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/15$150
Wed 9/186:25 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Tue 9/2411:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/16$151
Sat 9/144:15 pmORD - SEA
Nonstop4h 37mUnited Airlines
Sat 9/215:00 pmSEA - ORD
Nonstop4h 00mUnited Airlines
Deal found 5/15$168
Wed 8/146:50 pmORD - SEA
Nonstop4h 38mDelta
Mon 8/195:55 pmSEA - ORD
Nonstop3h 59mDelta
Deal found 5/15$179
Fri 9/68:20 amORD - SEA
Nonstop4h 33mAmerican Airlines
Tue 9/1011:50 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/15$181
Sat 6/86:50 pmORD - SEA
Nonstop4h 44mDelta
Wed 6/127:10 amSEA - ORD
Nonstop4h 04mDelta
Deal found 5/15$189
Sat 6/85:15 pmORD - SEA
Nonstop4h 33mAmerican Airlines
Tue 6/115:10 amSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 5/16$194
Sat 6/154:00 pmORD - SEA
Nonstop4h 40mUnited Airlines
Thu 6/2012:25 amSEA - ORD
Nonstop3h 56mUnited Airlines
Deal found 5/15$202

Illinois to Seattle flights leaving soon

Find last-minute flight options from Illinois 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 2,637,452 searches. Data last updated May 16, 2024.
Have a look at some of the flights available from Illinois to Seattle departing last-minute. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Wed 5/2911:31 amMDW - SEA
1 stop9h 54mFrontier
Tue 6/119:41 amSEA - MDW
1 stop24h 19mFrontier
Deal found 5/15$169
Tue 5/286:00 amMDW - SEA
1 stop27h 34mFrontier
Mon 6/38:00 pmSEA - MDW
1 stop7h 50mFrontier
Deal found 5/15$170
Thu 5/308:55 pmMDW - SEA
1 stop25h 09mFrontier
Tue 6/48:14 pmSEA - MDW
1 stop13h 46mFrontier
Deal found 5/15$171
Tue 5/286:00 amMDW - SEA
1 stop27h 34mFrontier
Thu 5/309:30 amSEA - MDW
1 stop9h 57mFrontier
Deal found 5/15$172
Wed 5/299:10 pmMDW - SEA
1 stop27h 02mFrontier
Sat 6/110:08 pmSEA - MDW
1 stop11h 01mFrontier
Deal found 5/15$173
Wed 5/299:10 pmMDW - SEA
1 stop27h 02mFrontier
Tue 6/111:47 pmSEA - MDW
2 stops12h 46mFrontier
Deal found 5/15$174
Tue 5/286:00 amMDW - SEA
1 stop27h 34mFrontier
Thu 6/611:28 amSEA - MDW
1 stop8h 17mFrontier
Deal found 5/15$176
Wed 5/299:10 pmMDW - SEA
1 stop27h 02mFrontier
Thu 6/611:28 amSEA - MDW
1 stop8h 17mFrontier
Deal found 5/15$177
Thu 5/308:55 pmMDW - SEA
1 stop25h 09mFrontier
Fri 5/3110:24 pmSEA - MDW
1 stop10h 49mFrontier
Deal found 5/15$178

One-way flights to Seattle from Illinois

Search for one-way flight options from Illinois 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 2,637,452 searches. Data last updated May 16, 2024.
Users in need of a one-way flight from Illinois to Seattle can choose from these deals. For those needing a return trip from Illinois, there is a search form available above.
Tue 6/1110:01 pmORD - SEA
1 stop12h 31mSpirit Airlines
Deal found 5/16$64
Tue 6/1110:01 pmORD - SEA
1 stop12h 31mSpirit Airlines
Deal found 5/15$70
Wed 9/46:00 amORD - SEA
Nonstop4h 34mAlaska Airlines
Deal found 5/16$71
Tue 6/1810:01 pmORD - SEA
1 stop12h 31mSpirit Airlines
Deal found 5/15$72
Tue 6/1810:01 pmORD - SEA
1 stop12h 31mSpirit Airlines
Deal found 5/16$73
Tue 8/202:13 pmORD - SEA
Nonstop4h 29mDelta
Deal found 5/16$75
Wed 10/96:25 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Deal found 5/14$76
Tue 6/112:06 pmMDW - SEA
1 stop7h 04mFrontier
Deal found 5/16$85
Mon 6/178:05 pmORD - SEA
1 stop17h 03mSun Country Air
Deal found 5/15$86

Find flights from Illinois to Seattle within your budget

Customize your flight search to find flights from Illinois 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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$139 - $186

Route

Depart

Return

Price

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 6/4

1 stop10h 17m

Seattle/Tacoma Intl

Tue 6/11

1 stop13h 24m

$139

Chicago O'Hare IntlSeattle/Tacoma Intl

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 9/4

Nonstop4h 33m

Seattle/Tacoma Intl

Tue 9/10

Nonstop4h 05m

$149

Chicago O'Hare IntlSeattle/Tacoma Intl

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 9/18

Nonstop4h 46m

Seattle/Tacoma Intl

Tue 9/24

Nonstop4h 00m

$150

Chicago O'Hare IntlSeattle/Tacoma Intl

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 9/18

Nonstop4h 46m

Seattle/Tacoma Intl

Tue 9/24

Nonstop4h 00m

$151

Chicago MidwaySeattle/Tacoma Intl

MDW - SEA

MDWSEA

Chicago Midway

Tue 8/20

1 stop28h 37m

Seattle/Tacoma Intl

Wed 8/28

1 stop8h 42m

$166

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Wed 6/19

1 stop8h 14m

Seattle/Tacoma Intl

Tue 6/25

1 stop13h 24m

$175

Chicago O'Hare IntlSeattle/Tacoma Intl

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 9/18

Nonstop4h 34m

Seattle/Tacoma Intl

Tue 9/24

1 stop8h 15m

$178

Chicago O'Hare IntlSeattle/Tacoma Intl

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 8/14

Nonstop4h 38m

Seattle/Tacoma Intl

Wed 8/21

Nonstop3h 59m

$179

Chicago O'Hare IntlSeattle/Tacoma Intl

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 7/1

1 stop16h 26m

Seattle/Tacoma Intl

Fri 7/5

1 stop9h 34m

$186

Flights are sorted by cheapest first

Deals found on 5/15

No data available for this route at this time. Please check back soon.

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 16, 2024.
See what other customers who have flown with United Airlines, American Airlines and Frontier from Illinois to Seattle have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Southwest
8.2
Very good
6,040 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Alaska Airlines
8.1
Very good
9,157 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Delta
8.0
Very good
10,673 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

WestJet
7.5
Good
2,919 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

United Airlines
7.4
Good
10,924 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Illinois to Seattle.

  • Can I find flights from Illinois to Seattle for under $200 on Cheapflights?

    Yes, there are multiple flights from Illinois to Seattle for under $200. The cheapest flight booked recently is on Multiple Airlines for just $139, but on average you can expect to pay $163.

  • Are there nonstop flights from Illinois to Seattle for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from Illinois to Seattle under $200. A good price for a nonstop flight from Illinois to Seattle is less than $198.

  • Are there last-minute flights available from Illinois to Seattle for under $200?

    There are currently 20+ open flights from Illinois to Seattle within the next 7 days for less than $200.

  • What days are nonstop flights available from Illinois to Seattle?

    Days when nonstop flights are available for this flight are: Sunday, Monday, Tuesday, Thursday, Friday, Saturday.

  • How many flights depart from Illinois to Seattle on average per day?

    Per day, 56 flights depart from Illinois to Seattle on average.
    Early Morning (Midnight to 6am) - 18% of flight departures
    Morning (6am - Noon) - 16% of flight departures
    Afternoon (Noon - 6pm) - 27% of flight departures
    Evening (6pm - Midnight) - 39% of flight departures

  • How long is the flight from Illinois to Seattle?

    Departing from Illinois to Seattle will take you 4h 33m. The distance between Illinois and Seattle is about 1725 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Seattle one-way?

    The cheapest airlines for a one-way flight from Illinois to Seattle are Spirit Airlines ($64), Alaska Airlines ($71), and Delta ($75).

  • What are the most popular routes from Illinois to Seattle?

    The most popular route from Illinois to Seattle is Chicago O'Hare Intl - Seattle/Tacoma Intl. You may also consider Chicago Midway - Seattle/Tacoma Intl or Lambert-St Louis - Seattle/Tacoma Intl.

  • What are the most popular airlines that fly from Illinois to Seattle?

    Before booking your flight from Illinois to Seattle check out the most popular airlines for this route: Undisclosed Carrier, American Airlines or Alaska Airlines.

  • What are the most reliable airlines from Illinois to Seattle?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Seattle on time: WestJet (100%), KLM (94%), Korean Air (93%).

  • What are the cheapest flights from Illinois to Seattle?

    The cheapest flight price from Illinois to Seattle is $99. On average you can expect to pay $635. The most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), can usually be booked for $149.

  • What does ORD to SEA mean?

    Chicago O'Hare Intl Airport is ORD and Seattle/Tacoma Intl Airport is SEA. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring on your Illinois 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 Illinois to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Illinois 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 Illinois to Seattle that include hotel bookings?

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

  • How can I find direct flights from Illinois to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Seattle that allow pets onboard?

    Many airlines flying from Illinois 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 Illinois to Seattle?

    Yes, you can often find last-minute deals on Illinois 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 Illinois to Seattle flight deals updated?

    The Illinois to Seattle flight deals you see on this page were last updated on 5/16.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

Los Angeles to Seattle flights
John F Kennedy Intl to Seattle flights
Dallas/Fort Worth to Seattle flights
Newark to Seattle flights
San Francisco to Seattle flights
Boston to Seattle flights
Atlanta to Seattle flights
O'Hare Intl to Seattle flights
Santa Ana to Seattle flights
Dulles Intl to Seattle flights
LaGuardia to Seattle flights
Ontario to Seattle flights
Reagan-National to Seattle flights
Burbank to Seattle flights
Los Angeles to Portland flights
Denver to Seattle flights
Sky Harbor Intl to Seattle flights
Detroit to Seattle flights
Minneapolis to Seattle flights
San Diego to Seattle flights
Baltimore to Seattle flights
San Jose to Seattle flights
Hobby to Seattle flights
Austin to Seattle flights
Salt Lake City to Seattle flights
Orlando to Seattle flights
Philadelphia to Seattle flights
Midway to Seattle flights
John F Kennedy Intl to Portland flights
George Bush Intcntl to Seattle flights
Oakland to Seattle flights
Raleigh to Seattle flights
Las Vegas to Seattle flights
Tampa to Seattle flights
Newark to Portland flights
Ontario to Portland flights
Kansas City to Seattle flights
Cincinnati to Seattle flights
Nashville to Seattle flights
Sacramento to Seattle flights
Fort Lauderdale to Seattle flights
Boston to Portland flights
San Francisco to Portland flights
Charlotte to Seattle flights
Indianapolis to Seattle flights
Dallas/Fort Worth to Portland flights
Los Angeles to Everett flights
Honolulu to Seattle flights
LaGuardia to Portland flights
Cleveland to Seattle flights

Top 6 airlines flying from Illinois to Seattle

Discover the top 6 airlines that operate flights from Illinois 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 2,637,452 searches. Data last updated May 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$84Average$444FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapest$99Average$466FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$109Average$537FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$114Average$582FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FrontierCheapest$123Average$248FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$137Average$324FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Los Angeles to Rome flights
Jacksonville to Miami flights
Las Vegas to Salt Lake City flights
New York to Seattle flights
Nashville to Orlando flights
Dallas to Salt Lake City flights
New York to Japan flights
Houston to Nashville flights
Houston to Dubai flights
Savannah to Atlanta flights
Memphis to Atlanta flights
Illinois to Seoul flights

Search flights from Illinois to Seattle by cabin class

Find flights from Illinois to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Illinois to Seattle

Find hourly flight availability from Illinois 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 16, 2024.
8%of flight departuresEarly morningMidnight to 6 am
20%of flight departuresMorning6 am to noon
35%of flight departuresAfternoonNoon to 6 pm
37%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Montes Claros
Flights to Girona Costa Brava
Flights to Naxos
Flights to Bourgas
Flights to Hyannis Barnstable
Flights to Samos
Flights to Reggio Calabria Tito Menniti
Flights to Devils Lake
Flights to Ningbo Lishe Intl
Flights to Pellston Emmet County
Flights to Provincetown
Flights to Cortez Montezuma County
Flights to Ohrid
Flights to Oran Es Senia
Flights to Menorca/Mahon
Flights to Hakodate
Flights to Ordu/Giresun
Flights to Laayoune Hassan I
Flights to Cornwall Newquay
Flights to Melilla
Flights to Rennes St Jacques
Flights to Parikia Paros
Flights to Constanţa Mihail Kogalniceanu
Flights to Miyakojima Hirara

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 Illinois to Seattle?

Deals for Illinois to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

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 Seattle from Illinois.

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

Yes! Cheapflights helps users easily find flights from Illinois to Seattle with no change fees.

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

Of course! You can now track prices for flights from Illinois to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines