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Cheap flights from Seattle (SEA) to Illinois from $59

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 5/4. 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.
SEA — ORD
Apr 23 — Apr 301
From?
To?
Tue 4/23
Tue 4/30
1 adult, Economy
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How far in advance should I book a flight from Seattle to Illinois?

Users have found that booking a flight from Seattle to Illinois at least 39 days early can save you up to 73% on average compared to booking a flight this week. If booking 39 days before your flight isn’t an option for you, users have found flights from Seattle to Illinois for as little as $296 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 $575 for flights departing within the next 3 days.

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

Flights from Seattle to Illinois lean towards being more expensive in July. Prices are generally better when you fly from Seattle to Illinois in January, with the cheapest ticket starting at $99.

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

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

Cheap Alaska Airlines flights from Seattle to Illinois

Explore cheap flight options specifically provided by Alaska Airlines for the route between Seattle and Illinois. 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 3,192,047 searches. Data last updated April 18, 2024.
Take a look at some of the lowest-priced Alaska Airlines flights heading from Seattle to Illinois. It's recommended that users confirm their flight details before booking.
Sat 5/116:00 amSEA - ORD
Nonstop4h 10mAlaska Airlines
Tue 5/142:53 pmORD - SEA
1 stop6h 14mAlaska Airlines
Deal found 4/17$178
Tue 5/1411:46 pmSEA - ORD
Nonstop3h 59mAlaska Airlines
Wed 5/158:00 amORD - SEA
Nonstop4h 34mAlaska Airlines
Deal found 4/18$193
Wed 5/156:00 amSEA - ORD
Nonstop4h 10mAlaska Airlines
Wed 5/296:00 amORD - SEA
Nonstop4h 27mAlaska Airlines
Deal found 4/18$199
Fri 5/311:46 pmSEA - ORD
Nonstop3h 59mAlaska Airlines
Sat 5/48:35 amORD - SEA
1 stop7h 45mAlaska Airlines
Deal found 4/18$203
Tue 5/75:58 pmSEA - ORD
Nonstop4h 00mAlaska Airlines
Tue 5/142:53 pmORD - SEA
1 stop6h 14mAlaska Airlines
Deal found 4/18$208
Tue 4/3011:46 pmSEA - ORD
Nonstop3h 59mAlaska Airlines
Wed 5/18:00 amORD - SEA
Nonstop4h 34mAlaska Airlines
Deal found 4/17$277
Wed 5/222:20 pmSEA - ORD
Nonstop4h 04mAlaska Airlines
Fri 5/246:00 amORD - SEA
Nonstop4h 27mAlaska Airlines
Deal found 4/18$283
Sat 4/276:00 amSEA - ORD
Nonstop4h 10mAlaska Airlines
Tue 4/308:00 amORD - SEA
Nonstop4h 34mAlaska Airlines
Deal found 4/16$284
Thu 5/25:58 pmSEA - ORD
Nonstop4h 00mAlaska Airlines
Mon 5/68:35 amORD - SEA
1 stop7h 51mAlaska Airlines
Deal found 4/18$297

Cheap Delta flights from Seattle to Illinois

Explore cheap flight options specifically provided by Delta for the route between Seattle and Illinois. 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 3,192,047 searches. Data last updated April 18, 2024.
Some of the best deals we've found on Delta flights traveling from Seattle to Illinois. Ensure the flight price, dates, time, and airline match your criteria before you book.
Sat 5/412:35 amSEA - STL
1 stop8h 24mDelta
Wed 5/85:30 pmSTL - SEA
1 stop6h 51mDelta
Deal found 4/18$227
Mon 7/15:15 pmSEA - STL
1 stop5h 42mDelta
Wed 7/102:30 pmSTL - SEA
1 stop5h 57mDelta
Deal found 4/18$257
Tue 4/2312:35 amSEA - STL
1 stop8h 16mDelta
Tue 4/305:30 pmSTL - SEA
1 stop7h 08mDelta
Deal found 4/17$262
Sun 4/285:35 amSEA - STL
1 stop5h 56mDelta
Tue 5/75:30 pmSTL - SEA
1 stop6h 51mDelta
Deal found 4/18$268
Tue 4/231:30 pmSEA - ORD
Nonstop3h 55mDelta
Tue 4/302:20 pmORD - SEA
Nonstop4h 40mDelta
Deal found 4/17$294
Tue 4/2312:35 amSEA - STL
1 stop8h 16mDelta
Tue 4/305:30 pmSTL - SEA
1 stop7h 08mDelta
Deal found 4/18$308
Sat 4/2712:35 amSEA - ORD
1 stop6h 00mDelta
Fri 5/36:10 amORD - SEA
Nonstop4h 36mDelta
Deal found 4/18$312
Thu 4/255:10 pmSEA - ORD
1 stop5h 49mDelta
Wed 5/16:50 pmORD - SEA
Nonstop4h 45mDelta
Deal found 4/16$317
Mon 5/206:00 pmSEA - ORD
Nonstop4h 05mDelta
Wed 5/221:45 pmORD - SEA
1 stop6h 41mDelta
Deal found 4/17$326

Cheap Seattle to Illinois flights in April & May 2024

Find cheap flight options from Seattle to Illinois specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,192,047 searches. Prices were last updated on April 18, 2024.
Check out some of the best flight deals from Seattle to Illinois in 2024. More deals are always being added, so be sure to check back regularly.
Tue 5/79:35 pmSEA - STL
1 stop10h 12mFrontier
Mon 5/2010:21 pmSTL - SEA
1 stop13h 34mFrontier
Deal found 4/16$116
Wed 5/15:58 pmSEA - MDW
1 stop12h 38mFrontier
Tue 5/710:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/17$117
Sat 5/49:32 pmSEA - MDW
1 stop8h 59mFrontier
Tue 5/710:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/18$118
Mon 5/69:00 pmSEA - STL
1 stop11h 18mFrontier
Wed 5/87:51 pmSTL - SEA
1 stop22h 40mFrontier
Deal found 4/18$123
Fri 5/36:03 pmSEA - MDW
1 stop20h 35mFrontier
Tue 5/710:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/18$128
Wed 5/19:55 amSEA - STL
1 stop8h 44mFrontier
Wed 5/87:51 pmSTL - SEA
1 stop22h 40mFrontier
Deal found 4/17$128
Fri 5/310:34 pmSEA - MDW
1 stop16h 04mFrontier
Mon 5/69:55 pmMDW - SEA
1 stop13h 49mFrontier
Deal found 4/17$133
Sat 5/112:55 pmSEA - ORD
1 stop8h 01mFrontier
Fri 5/176:50 pmORD - SEA
1 stop16h 32mFrontier
Deal found 4/17$136
Sat 5/112:55 pmSEA - ORD
1 stop8h 01mFrontier
Fri 5/176:50 pmORD - SEA
1 stop16h 32mFrontier
Deal found 4/18$137

Seattle to Illinois 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Illinois in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated April 18, 2024.
Check out some of the best flight deals from Seattle to Illinois in 2024. More deals are always being added, so be sure to check back regularly.
Tue 5/79:35 pmSEA - STL
1 stop10h 12mFrontier
Mon 5/2010:21 pmSTL - SEA
1 stop13h 34mFrontier
Deal found 4/16$116
Wed 5/15:58 pmSEA - MDW
1 stop12h 38mFrontier
Tue 5/710:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/17$117
Sat 5/49:32 pmSEA - MDW
1 stop8h 59mFrontier
Tue 5/710:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/18$118
Mon 5/69:00 pmSEA - STL
1 stop11h 18mFrontier
Wed 5/87:51 pmSTL - SEA
1 stop22h 40mFrontier
Deal found 4/18$123
Fri 5/36:03 pmSEA - MDW
1 stop20h 35mFrontier
Tue 5/710:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/18$128
Wed 5/19:55 amSEA - STL
1 stop8h 44mFrontier
Wed 5/87:51 pmSTL - SEA
1 stop22h 40mFrontier
Deal found 4/17$128
Fri 5/310:34 pmSEA - MDW
1 stop16h 04mFrontier
Mon 5/69:55 pmMDW - SEA
1 stop13h 49mFrontier
Deal found 4/17$133
Sat 5/112:55 pmSEA - ORD
1 stop8h 01mFrontier
Fri 5/176:50 pmORD - SEA
1 stop16h 32mFrontier
Deal found 4/17$136
Sat 5/112:55 pmSEA - ORD
1 stop8h 01mFrontier
Fri 5/176:50 pmORD - SEA
1 stop16h 32mFrontier
Deal found 4/18$137

Non-stop flights to Illinois from Seattle

Discover non-stop flight options from Seattle to Illinois. 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 3,192,047 searches. Data last updated April 18, 2024.
For a shorter flight, select one of these non-stop flights from Seattle to Illinois. Those looking to potentially save on 1 or 2-stop flights from Seattle to Illinois should utilize the search form at the the top of the page.
Wed 5/156:00 amSEA - ORD
Nonstop4h 10mAlaska Airlines
Wed 5/226:00 amORD - SEA
Nonstop4h 27mAlaska Airlines
Deal found 4/18$139
Sat 5/1111:46 pmSEA - ORD
Nonstop3h 59mAlaska Airlines
Fri 5/179:20 pmORD - SEA
Nonstop4h 35mAlaska Airlines
Deal found 4/17$163
Sat 5/1111:46 pmSEA - ORD
Nonstop3h 59mAlaska Airlines
Fri 5/179:20 pmORD - SEA
Nonstop4h 35mAlaska Airlines
Deal found 4/17$169
Fri 5/36:00 pmSEA - ORD
Nonstop3h 58mDelta
Tue 5/77:40 pmORD - SEA
Nonstop4h 42mDelta
Deal found 4/17$179
Fri 5/311:46 pmSEA - ORD
Nonstop3h 59mAlaska Airlines
Sat 5/48:00 amORD - SEA
Nonstop4h 34mAlaska Airlines
Deal found 4/17$193
Wed 6/1210:52 pmSEA - ORD
Nonstop4h 15mAmerican Airlines
Mon 6/177:08 pmORD - SEA
Nonstop4h 49mAmerican Airlines
Deal found 4/17$198
Wed 5/156:00 amSEA - ORD
Nonstop4h 10mAlaska Airlines
Wed 5/296:00 amORD - SEA
Nonstop4h 27mAlaska Airlines
Deal found 4/18$199
Tue 5/146:00 pmSEA - ORD
Nonstop4h 05mDelta
Mon 5/207:40 pmORD - SEA
Nonstop4h 42mDelta
Deal found 4/16$204
Wed 6/127:10 amSEA - ORD
Nonstop4h 04mDelta
Sun 6/167:30 amORD - SEA
Nonstop4h 34mDelta
Deal found 4/17$208

Seattle to Illinois flights leaving soon

Find last-minute flight options from Seattle to Illinois 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 3,192,047 searches. Data last updated April 18, 2024.
Consider one of these great deals we found on last-minute flights from Seattle to Illinois. It's wise to confirm all flight details are correct before booking.
Sat 4/279:32 pmSEA - MDW
1 stop8h 59mFrontier
Tue 4/3010:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/16$139
Sun 4/289:20 pmSEA - MDW
1 stop12h 16mFrontier
Mon 5/69:55 pmMDW - SEA
1 stop13h 49mFrontier
Deal found 4/18$168
Sat 4/279:32 pmSEA - MDW
1 stop8h 59mFrontier
Sun 5/510:27 pmMDW - SEA
1 stop10h 53mFrontier
Deal found 4/16$169
Sun 4/289:20 pmSEA - MDW
1 stop12h 16mFrontier
Fri 5/39:16 pmMDW - SEA
1 stop14h 04mFrontier
Deal found 4/18$178
Thu 4/2510:04 pmSEA - MDW
1 stop11h 34mFrontier
Tue 4/3010:34 pmMDW - SEA
1 stop12h 21mFrontier
Deal found 4/17$179
Tue 4/2310:44 amSEA - MDW
1 stop9h 00mFrontier
Wed 5/15:30 amMDW - SEA
1 stop13h 28mFrontier
Deal found 4/16$188
Sat 4/279:32 pmSEA - MDW
1 stop8h 59mFrontier
Sun 4/2810:27 pmMDW - SEA
1 stop10h 53mFrontier
Deal found 4/17$189
Thu 4/2510:04 pmSEA - MDW
1 stop11h 34mFrontier
Mon 4/299:55 pmMDW - SEA
1 stop13h 49mFrontier
Deal found 4/17$190
Thu 4/2510:04 pmSEA - ORD
1 stop24h 52mFrontier
Thu 5/26:27 pmORD - SEA
1 stop29h 07mFrontier
Deal found 4/17$191

One-way flights to Illinois from Seattle

Search for one-way flight options from Seattle to Illinois. 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 3,192,047 searches. Data last updated April 18, 2024.
Some of the best available deals we've found on one-way flights from Seattle to Illinois. Those seeking round-trip flights from Seattle to Illinois should utilize the search form at the the top of the page.
Sat 5/42:55 pmSEA - ORD
1 stop8h 01mFrontier
Deal found 4/17$59
Sat 5/49:32 pmSEA - MDW
1 stop8h 59mFrontier
Deal found 4/18$59
Tue 5/79:35 pmSEA - ORD
1 stop25h 21mFrontier
Deal found 4/17$66
Thu 5/2311:02 pmSEA - ORD
1 stop28h 08mFrontier
Deal found 4/17$69
Mon 5/135:02 pmSEA - MDW
1 stop27h 03mFrontier
Deal found 4/18$69
Tue 5/216:00 pmSEA - ORD
Nonstop4h 05mDelta
Deal found 4/18$70
Tue 5/79:35 pmSEA - MDW
1 stop12h 03mFrontier
Deal found 4/17$70
Tue 5/149:35 pmSEA - ORD
1 stop25h 21mFrontier
Deal found 4/17$71
Sat 5/256:00 pmSEA - ORD
Nonstop4h 05mDelta
Deal found 4/17$75

Find flights from Seattle to Illinois within your budget

Customize your flight search to find flights from Seattle to Illinois 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 3,192,047 searches. Data last updated April 18, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$117 - $270

Route

Depart

Return

Price

Seattle/Tacoma IntlChicago Midway

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Wed 5/1

1 stop12h 38m

Chicago Midway

Tue 5/7

1 stop12h 21m

$117

Seattle/Tacoma IntlChicago Midway

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 5/11

1 stop8h 59m

Chicago Midway

Tue 5/14

1 stop12h 21m

$118

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 5/18

Nonstop4h 06m

Chicago O'Hare Intl

Tue 5/21

1 stop11h 53m

$168

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 5/11

Nonstop4h 12m

Chicago O'Hare Intl

Fri 5/17

Nonstop4h 38m

$169

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 5/11

Nonstop4h 10m

Chicago O'Hare Intl

Tue 5/14

1 stop6h 14m

$178

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 6/5

1 stop9h 44m

Chicago O'Hare Intl

Mon 6/10

1 stop24h 44m

$207

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Sat 5/4

1 stop8h 24m

Lambert-St Louis

Wed 5/8

1 stop6h 51m

$227

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 5/9

Nonstop3h 58m

Chicago O'Hare Intl

Sun 5/12

1 stop8h 38m

$244

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 6/7

1 stop5h 58m

Lambert-St Louis

Sun 6/9

1 stop6h 49m

$270

Flights are sorted by cheapest first

Deals found on 4/17

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 18, 2024.
Read reviews from past customers who have flown Alaska Airlines, Delta and American Airlines from Seattle to Illinois. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,208 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.9

Crew

8.7

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Southwest
8.2
Very good
6,208 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.9

Crew

8.7

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Alaska Airlines
8.1
Very good
9,106 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.9

Crew

8.7

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Delta
8.1
Very good
11,104 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.9

Crew

8.7

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

WestJet
7.5
Good
3,010 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.9

Crew

8.7

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

United Airlines
7.4
Good
11,341 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.9

Crew

8.7

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Related info for your journey

Find useful and relevant information for your journey from Seattle to Illinois. 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 Seattle to Illinois?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Illinois. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

    Yes, there are multiple flights from Seattle to Illinois for under $200. The cheapest flight booked recently is on Frontier for just $117, but on average you can expect to pay $135.

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

    Cheapflights has at least 20 direct flights from Seattle to Illinois under $200. A good price for a nonstop flight from Seattle to Illinois is less than $211.

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

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

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

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

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

    Per day, 22 flights depart from Seattle to Illinois on average.
    Early Morning (Midnight to 6am) - 32% of flight departures
    Morning (6am - Noon) - 45% of flight departures
    Afternoon (Noon - 6pm) - 9% of flight departures
    Evening (6pm - Midnight) - 14% of flight departures

  • How long is the flight from Seattle to Illinois?

    Airlines like Frontier fly from Seattle to Illinois in about 12h 38m. The time it takes to get you to your destination can typically vary by up to . The distance between Seattle and Illinois is about 1725 mi.

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

    The cheapest airlines for a one-way flight from Seattle to Illinois are Frontier ($59), Delta ($70), and Spirit Airlines ($95).

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

    The most popular flight routes from Seattle to Illinois are Seattle/Tacoma Intl - Chicago O'Hare Intl, Seattle/Tacoma Intl - Chicago Midway and Seattle/Tacoma Intl - Lambert-St Louis.

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

    The most popular airlines flying from Seattle to Illinois are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to Illinois consider choosing Scandinavian Airlines (97%), SWISS (95%) or Brussels Airlines (95%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Illinois?

    On average you can expect to pay $878 for a flight from Seattle to Illinois. The cheapest flight overall is $64 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at $139.

  • What does SEA to ORD mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport flight would often be abbreviated as a SEA to ORD flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Champaign University-Willard Airport (CMI).

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

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

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

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

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

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

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

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

    Many airlines flying from Seattle to Illinois 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 Seattle to Illinois?

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

    The Seattle to Illinois flight deals you see on this page were last updated on 4/18.

See more FAQs

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Top 6 airlines flying from Seattle to Illinois

Discover the top 6 airlines that operate flights from Seattle to Illinois. 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 3,192,047 searches. Data last updated April 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$98Average$435FlexibilityNo cancel feeOn-timeN/A
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Alaska AirlinesCheapest$99Average$480FlexibilityNo cancel feeOn-time75%
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United AirlinesCheapest$114Average$529FlexibilityNo cancel feeOn-time69%
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FrontierCheapest$120Average$181FlexibilityNo cancel feeOn-time62%
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Spirit AirlinesCheapest$129Average$325FlexibilityNo cancel feeOn-time65%
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American AirlinesCheapest$150Average$516FlexibilityNo cancel feeOn-time71%
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Search flights from Seattle to Illinois by cabin class

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

Find hourly flight availability from Seattle to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 18, 2024.
16%of flight departuresEarly morningMidnight to 6 am
27%of flight departuresMorning6 am to noon
38%of flight departuresAfternoonNoon to 6 pm
19%of flight departuresEvening6 pm to midnight
Midnight
6 AM
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6 PM

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Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Illinois?

Cheapflights helps you search for flights from Seattle to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to Illinois for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from Seattle to Illinois with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on Seattle to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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