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$48+ Cheap flights from Seattle (SEA) to Illinois

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ORD
Oct 15 — Oct 221
From?
To?
Tue 10/15
Tue 10/22
1 adult, Economy
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Find cheap flights from Seattle to Illinois with Cheapflights

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Cheap Seattle to Illinois flights in October & November 2024

Find cheap flight options from Seattle to Illinois specifically for the months of October and November 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,713,696 searches. Prices were last updated on October 10, 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.
This Southwest deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/29:35 amSEA - MDW
Nonstop4h 00mSouthwest
Sun 11/39:45 amMDW - SEA
Nonstop4h 40mSouthwest
Deal found 10/10$98
This Mytrip deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/319:47 pmSEA - MDW
1 stop23h 26mFrontier
Thu 11/71:17 pmMDW - SEA
1 stop9h 52mFrontier
Deal found 10/10$104
This Mytrip deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/49:36 pmSEA - STL
1 stop23h 37mFrontier
Mon 11/114:09 pmSTL - SEA
1 stop18h 06mFrontier
Deal found 10/9$105
This Delta deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/67:10 amSEA - MDW
1 stop7h 53mDelta
Thu 11/71:12 pmMDW - SEA
1 stop7h 12mDelta
Deal found 10/10$116
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/111:55 pmSEA - ORD
Nonstop3h 57mUnited Airlines
Tue 11/512:45 pmORD - SEA
1 stop7h 56mUnited Airlines
Deal found 10/9$157
This Delta deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/77:10 amSEA - ORD
Nonstop4h 05mDelta
Mon 11/112:15 pmORD - SEA
Nonstop4h 44mDelta
Deal found 10/9$158
This FareScan deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/19:01 pmSEA - ORD
1 stop11h 47mSpirit Airlines
Tue 11/510:33 amORD - SEA
2 stops15h 37mSpirit Airlines
Deal found 10/9$159
This Kiwi.com deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/710:11 pmSEA - ORD
1 stop10h 16mMultiple Airlines
Thu 11/146:20 amORD - SEA
Nonstop4h 38mMultiple Airlines
Deal found 10/8$160
This CheapOair deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/179:47 pmSEA - ORD
1 stop10h 37mFrontier
Wed 10/231:46 pmORD - SEA
1 stop20h 26mFrontier
Deal found 10/10$171

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 2,713,696 searches. Data last updated October 10, 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.
This Kiwi.com deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/111:06 pmSEA - ORD
Nonstop3h 54mAlaska Airlines
Thu 11/77:19 pmORD - SEA
Nonstop4h 41mAlaska Airlines
Deal found 10/10$88
This KAYAK deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/107:10 amSEA - ORD
Nonstop4h 05mDelta
Thu 11/146:05 amORD - SEA
Nonstop4h 50mDelta
Deal found 10/10$96
This Southwest deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/29:35 amSEA - MDW
Nonstop4h 00mSouthwest
Sun 11/39:45 amMDW - SEA
Nonstop4h 40mSouthwest
Deal found 10/10$98
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/812:55 pmSEA - ORD
1 stop9h 57mUnited Airlines
Sun 11/109:20 amORD - SEA
Nonstop4h 48mUnited Airlines
Deal found 10/9$102
This Mytrip deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/710:11 pmSEA - ORD
1 stop10h 16mFrontier
Thu 11/146:06 pmORD - SEA
1 stop16h 14mFrontier
Deal found 10/8$103
This Mytrip deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/319:47 pmSEA - MDW
1 stop23h 26mFrontier
Thu 11/71:17 pmMDW - SEA
1 stop9h 52mFrontier
Deal found 10/10$104
This Mytrip deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/49:36 pmSEA - STL
1 stop23h 37mFrontier
Mon 11/114:09 pmSTL - SEA
1 stop18h 06mFrontier
Deal found 10/9$105
This Mytrip deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/510:00 amSEA - ORD
1 stop9h 06mMultiple Airlines
Mon 11/1110:57 amORD - SEA
1 stop23h 18mMultiple Airlines
Deal found 10/10$112
This Delta deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/67:10 amSEA - MDW
1 stop7h 53mDelta
Thu 11/71:12 pmMDW - SEA
1 stop7h 12mDelta
Deal found 10/10$116

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 2,713,696 searches. Data last updated October 10, 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.
This CheapOair deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/179:47 pmSEA - ORD
1 stop25h 11mFrontier
Wed 10/231:46 pmORD - SEA
1 stop20h 26mFrontier
Deal found 10/9$171
This Kiwi.com deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/179:47 pmSEA - ORD
1 stop10h 37mMultiple Airlines
Wed 10/2311:08 pmORD - SEA
1 stop15h 25mMultiple Airlines
Deal found 10/9$200
This Cheapflightsfares deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/179:01 pmSEA - ORD
1 stop11h 47mSpirit Airlines
Mon 10/2111:08 pmORD - SEA
1 stop15h 25mSpirit Airlines
Deal found 10/9$207
This Mytrip deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/179:47 pmSEA - MDW
1 stop23h 26mFrontier
Mon 10/216:05 amMDW - SEA
1 stop16h 41mFrontier
Deal found 10/10$241
This Mytrip deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/189:36 pmSEA - STL
1 stop23h 52mFrontier
Sun 10/2010:59 pmSTL - SEA
1 stop13h 38mFrontier
Deal found 10/9$292
This Delta deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/206:00 pmSEA - ORD
Nonstop3h 59mDelta
Sun 10/276:20 amORD - SEA
Nonstop4h 30mDelta
Deal found 10/9$323
This Delta deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/165:25 pmSEA - STL
1 stop5h 20mDelta
Wed 10/236:25 pmSTL - SEA
1 stop7h 40mDelta
Deal found 10/8$331
This Alaska Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/187:00 amSEA - ORD
1 stop7h 47mAlaska Airlines
Wed 10/236:00 amORD - SEA
Nonstop4h 40mAlaska Airlines
Deal found 10/9$333
This Booking.com deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1711:59 pmSEA - STL
1 stop9h 31mMultiple Airlines
Fri 10/183:49 pmSTL - SEA
1 stop18h 18mMultiple Airlines
Deal found 10/9$369

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 2,713,696 searches. Data last updated October 10, 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.
This Spirit deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/135:28 pmSEA - ORD
1 stop9h 17mSpirit Airlines
Deal found 10/10$48
This Delta deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/47:10 amSEA - ORD
Nonstop4h 05mDelta
Deal found 10/9$49
This Southwest deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/610:05 amSEA - MDW
Nonstop4h 05mSouthwest
Deal found 10/10$49
This American Airlines deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/312:35 amSEA - ORD
Nonstop4h 01mAmerican Airlines
Deal found 10/10$50
This Mytrip deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2810:17 amSEA - MDW
1 stop8h 25mFrontier
Deal found 10/9$53
This United Airlines deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/167:14 amSEA - ORD
1 stop10h 53mUnited Airlines
Deal found 10/10$54
This Delta deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/166:00 amSEA - MDW
1 stop9h 02mDelta
Deal found 10/9$58
This Mytrip deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/319:47 pmSEA - ORD
1 stop25h 11mFrontier
Deal found 10/8$59
This Frontier deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/29:07 amSEA - STL
1 stop12h 21mFrontier
Deal found 10/8$60

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 2,713,696 searches. Data last updated October 10, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$88 - $159

Route

Depart

Return

Price

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 11/1

Nonstop3h 54m

Chicago O'Hare Intl

Thu 11/7

Nonstop4h 41m

$88

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 11/10

Nonstop4h 05m

Chicago O'Hare Intl

Thu 11/14

Nonstop4h 50m

$96

Seattle/Tacoma IntlChicago Midway

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 11/2

Nonstop4h 00m

Chicago Midway

Sun 11/3

Nonstop4h 40m

$98

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 11/8

1 stop9h 57m

Chicago O'Hare Intl

Fri 11/15

Nonstop4h 49m

$102

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 11/7

1 stop10h 16m

Chicago O'Hare Intl

Thu 11/14

1 stop16h 14m

$103

Seattle/Tacoma IntlChicago Midway

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Thu 10/31

1 stop23h 26m

Chicago Midway

Thu 11/7

1 stop9h 52m

$104

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 11/5

1 stop9h 06m

Chicago O'Hare Intl

Mon 11/11

1 stop23h 18m

$112

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 10/30

Nonstop4h 03m

Chicago O'Hare Intl

Mon 11/4

Nonstop4h 51m

$132

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 11/1

1 stop11h 47m

Chicago O'Hare Intl

Tue 11/5

2 stops15h 37m

$159

Flights are sorted by cheapest first

Deals found on 10/10

Best time to book a flight from Seattle to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Seattle to Illinois

Get recent, data-driven insights about flights from Seattle to Illinois including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Seattle to Illinois?

Currently, September is the cheapest month in which you can book a flight from Seattle to Illinois (average of $232). Flying from Seattle to Illinois in June is currently the most expensive (average of $308). 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.

What is the cheapest time of day to fly from SEA to IL?

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 October 10, 2024.

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.

Weekly flight availability from Seattle to Illinois

Explore weekly flight availability from Seattle to Illinois. 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 October 10, 2024.

The most flights from SEA to USIL are scheduled on a Thursday (52 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (22 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 October 10, 2024.
Read reviews from past customers who have flown Alaska Airlines, Delta and United 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
5,203 reviews

Boarding

8.3

Comfort

8.1

Entertainment

7.7

Food

7.2

Overall

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.2
Very good
5,203 reviews
Southwest
8.2
Very good
5,203 reviews

Boarding

8.3

Comfort

8.1

Entertainment

7.7

Food

7.2

Overall

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,392 reviews
Southwest
8.2
Very good
5,203 reviews

Boarding

8.3

Comfort

8.1

Entertainment

7.7

Food

7.2

Overall

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,963 reviews
Southwest
8.2
Very good
5,203 reviews

Boarding

8.3

Comfort

8.1

Entertainment

7.7

Food

7.2

Overall

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,366 reviews
Southwest
8.2
Very good
5,203 reviews

Boarding

8.3

Comfort

8.1

Entertainment

7.7

Food

7.2

Overall

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

WestJet
7.3
Good
2,809 reviews
Southwest
8.2
Very good
5,203 reviews

Boarding

8.3

Comfort

8.1

Entertainment

7.7

Food

7.2

Overall

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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 $100 on Cheapflights?

    Yes, there are multiple flights from Seattle to Illinois for under $100. The cheapest flight booked recently is on Alaska Airlines for just $88, but on average you can expect to pay $155.

  • Are there nonstop flights from Seattle to Illinois for under $100 on Cheapflights?

    Cheapflights has at least 7 direct flights from Seattle to Illinois under $100. A good price for a nonstop flight from Seattle to Illinois is less than $149.

  • 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: Monday, Tuesday, Thursday, Friday, Saturday.

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

    Per day, 28 flights depart from Seattle to Illinois on average.
    Early Morning (Midnight to 6am) - 25% of flight departures
    Morning (6am - Noon) - 54% of flight departures
    Afternoon (Noon - 6pm) - 7% of flight departures
    Evening (6pm - Midnight) - 14% of flight departures

  • How long is the flight from Seattle to Illinois?

    Airlines like Alaska Airlines, Delta, and Southwest fly from Seattle to Illinois in about 3h 54m. The time it takes to get you to your destination is usually consistent. The distance between Seattle and Illinois is about 1725 mi. Most flights are nonstop.

  • 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 Spirit Airlines ($48), Delta ($49), and Southwest ($49).

  • 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 reliable airlines from Seattle to Illinois?

    No one likes to see their flight delayed. When booking a flight from Seattle to Illinois consider choosing Iberia (87%), Royal Jordanian (87%) or Avianca (85%) 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 $648 for a flight from Seattle to Illinois. The cheapest flight overall is $83 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at $97.

  • 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?