$158+ Cheap flights from Seattle (SEA) to Chicago (CHI)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
Oct 22 — Oct 291
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Chicago with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago are usually found in February or January, booked 67 days in advance, depart on a Wednesday or Thursday and return on a Friday
Cheap flight deals from Seattle to Chicago
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Cheapest flights from Seattle to ChicagoExplore the most affordable flight options available from Seattle to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2026.
Explore the most affordable flight options available from Seattle to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2026.
This Delta deal was found by Cheapflights users on 9/18. 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 11/115:55 pm -
Nonstop4h 04m
Sun 11/156:40 am -
Nonstop4h 50m
Deal found 9/18![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 9/17. 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.
Tue 10/2012:10 am -
Nonstop3h 55m
Fri 10/2310:05 pm -
Nonstop4h 35m
Deal found 9/17![Southwest logo]()
$277
This Priceline deal was found by Cheapflights users on 9/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:51 pm -
Nonstop4h 08m
Mon 12/77:25 am -
1 stop10h 18m
Deal found 9/22![Multiple Airlines logo]()
$278
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 12/39:53 pm -
1 stop29h 06m
Mon 12/77:25 am -
1 stop10h 18m
Deal found 9/19![Frontier logo]()
$279
This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 11/59:13 pm -
1 stop30h 00m
Sun 11/85:15 pm -
1 stop18h 30m
Deal found 9/18![Frontier logo]()
$280
This Expedia deal was found by Cheapflights users on 9/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:45 pm -
1 stop29h 31m
Wed 10/218:01 pm -
1 stop24h 44m
Deal found 9/22![Frontier logo]()
$281
This Frontier deal was found by Cheapflights users on 9/21. 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.
Fri 11/64:27 pm -
1 stop5h 54m
Fri 11/136:30 am -
1 stop10h 42m
Deal found 9/21![Frontier logo]()
$282
This Priceline deal was found by Cheapflights users on 9/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:00 pm -
1 stop8h 34m
Sat 10/316:30 am -
1 stop10h 42m
Deal found 9/19![Frontier logo]()
$283
This Frontier deal was found by Cheapflights users on 9/19. 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.
Fri 10/238:00 pm -
1 stop8h 34m
Sat 10/316:30 am -
1 stop10h 42m
Deal found 9/19![Frontier logo]()
$284
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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.
Wed 10/218:00 pm -
1 stop8h 34m
Fri 10/236:30 am -
1 stop10h 42m
Deal found 9/19![Frontier logo]()
$285
This flugladen.de deal was found by Cheapflights users on 9/18. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:00 pm -
1 stop8h 34m
Sat 10/172:21 pm -
1 stop9h 12m
Deal found 9/18![Multiple Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 9/17. 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.
Fri 10/1612:10 am -
Nonstop3h 55m
Sat 10/246:15 am -
1 stop7h 40m
Deal found 9/17![Southwest logo]()
$287
Best flights from Seattle to ChicagoDiscover carefully curated flight deals from Seattle to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
Discover carefully curated flight deals from Seattle to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Wed 10/215:07 pm -
Nonstop4h 03m
Fri 10/238:12 pm -
Nonstop4h 44m
Deal found 9/17![United Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 9/17. 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.
Fri 10/1612:10 am -
Nonstop3h 55m
Sat 10/246:15 am -
1 stop7h 40m
Deal found 9/17![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 9/17. 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.
Fri 10/911:50 pm -
1 stop7h 03m
Sat 10/177:35 am -
1 stop9h 15m
Deal found 9/17![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 9/20. 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.
Tue 10/2011:56 am -
Nonstop4h 24m
Thu 11/59:30 am -
Nonstop4h 44m
Deal found 9/20![Alaska Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 9/17. 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 11/189:25 am -
1 stop8h 10m
Mon 11/239:45 pm -
Nonstop4h 50m
Deal found 9/17![Southwest logo]()
$287
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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.
Tue 10/2011:56 am -
Nonstop4h 24m
Tue 10/273:49 pm -
Nonstop4h 39m
Deal found 9/22![Alaska Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 9/22. 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 10/2110:39 am -
Nonstop4h 14m
Sat 10/2412:00 pm -
Nonstop4h 37m
Deal found 9/22![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 9/19. 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.
Thu 10/2210:42 am -
Nonstop4h 18m
Thu 10/298:30 pm -
Nonstop4h 47m
Deal found 9/19![United Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 9/17. 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.
Tue 10/2712:45 pm -
2 stops9h 05m
Thu 11/59:25 pm -
1 stop13h 00m
Deal found 9/17![Southwest logo]()
$308
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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.
Sat 12/125:51 pm -
Nonstop4h 08m
Tue 12/228:59 pm -
Nonstop4h 54m
Deal found 9/19![Alaska Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 9/19. 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 10/175:50 pm -
Nonstop4h 04m
Sat 10/314:00 pm -
Nonstop4h 44m
Deal found 9/19![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Thu 10/155:07 pm -
Nonstop4h 03m
Mon 10/198:09 pm -
Nonstop4h 44m
Deal found 9/22![United Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 9/20. 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.
Tue 10/135:30 pm -
Nonstop4h 04m
Mon 10/266:35 am -
Nonstop4h 45m
Deal found 9/20![Delta logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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.
Wed 10/2110:33 am -
Nonstop4h 17m
Sat 10/242:14 pm -
1 stop8h 19m
Deal found 9/22![Alaska Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 9/21. 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 10/2112:10 am -
Nonstop3h 55m
Thu 10/299:55 am -
1 stop10h 15m
Deal found 9/21![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 9/18. 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.
Mon 11/28:30 am -
2 stops10h 00m
Mon 11/910:00 pm -
Nonstop4h 45m
Deal found 9/18![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 9/19. 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.
Tue 10/2712:10 am -
Nonstop3h 55m
Sat 10/319:35 am -
2 stops10h 15m
Deal found 9/19![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 9/20. 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.
Tue 10/2712:45 pm -
2 stops9h 05m
Wed 11/410:15 am -
2 stops10h 20m
Deal found 9/20![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 9/21. 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.
Thu 10/226:50 pm -
1 stop8h 55m
Fri 10/2310:05 pm -
Nonstop4h 35m
Deal found 9/21![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 9/20. 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.
Sun 10/1112:10 am -
Nonstop3h 55m
Mon 10/1910:05 pm -
Nonstop4h 35m
Deal found 9/20![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 9/19. 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.
Fri 10/1612:10 am -
Nonstop3h 55m
Sun 10/1810:20 pm -
Nonstop4h 35m
Deal found 9/19![Southwest logo]()
$387
Last-minute flights from Seattle to ChicagoDiscover last-minute flight deals from Seattle to Chicago. Data last updated September 22, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Chicago. Data last updated September 22, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 9/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:45 pm -
1 stop29h 31m
Wed 10/218:01 pm -
1 stop24h 44m
Deal found 9/22![Frontier logo]()
$281
This Delta deal was found by Cheapflights users on 9/17. 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.
Fri 10/911:50 pm -
1 stop7h 03m
Sat 10/176:35 am -
Nonstop4h 45m
Deal found 9/17![Delta logo]()
$287
This flugladen.de deal was found by Cheapflights users on 9/18. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:00 pm -
1 stop8h 34m
Sat 10/172:21 pm -
1 stop9h 12m
Deal found 9/18![Multiple Airlines logo]()
$286
This Delta deal was found by Cheapflights users on 9/17. 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 10/145:30 pm -
Nonstop4h 04m
Tue 10/206:35 am -
Nonstop4h 45m
Deal found 9/17![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 9/17. 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.
Fri 10/1612:10 am -
Nonstop3h 55m
Sat 10/246:15 am -
1 stop7h 40m
Deal found 9/17![Southwest logo]()
$287
This Cheapflightsfares deal was found by Cheapflights users on 9/20. 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.
Sat 10/178:00 pm -
1 stop8h 34m
Sat 10/316:30 am -
1 stop10h 42m
Deal found 9/20![Frontier logo]()
$279
This Priceline deal was found by Cheapflights users on 9/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:00 pm -
1 stop8h 34m
Tue 10/206:30 am -
1 stop10h 42m
Deal found 9/19![Frontier logo]()
$283
This Southwest deal was found by Cheapflights users on 9/17. 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.
Tue 10/2012:10 am -
Nonstop3h 55m
Fri 10/2310:05 pm -
Nonstop4h 35m
Deal found 9/17![Southwest logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Wed 10/218:00 pm -
1 stop8h 34m
Tue 10/273:49 pm -
Nonstop4h 39m
Deal found 9/20![Multiple Airlines logo]()
$278
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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.
Wed 10/218:00 pm -
1 stop8h 34m
Fri 10/236:30 am -
1 stop10h 42m
Deal found 9/19![Frontier logo]()
$285
This Frontier deal was found by Cheapflights users on 9/19. 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.
Fri 10/238:00 pm -
1 stop8h 34m
Sat 10/316:30 am -
1 stop10h 42m
Deal found 9/19![Frontier logo]()
$284
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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.
Wed 10/284:27 pm -
1 stop5h 54m
Sun 11/15:15 pm -
1 stop18h 30m
Deal found 9/19![Frontier logo]()
$280
One-way flights from Seattle to ChicagoSearch for one-way flight options from Seattle to Chicago. Find affordable one-way fares based on user searches. Data last updated September 22, 2026.
Search for one-way flight options from Seattle to Chicago. Find affordable one-way fares based on user searches. Data last updated September 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Tue 10/64:27 pm -
2 stops34h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$158
This Delta deal was found by Cheapflights users on 9/20. 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 10/175:50 pm -
Nonstop4h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Delta logo]()
$159
This Southwest deal was found by Cheapflights users on 9/20. 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.
Sun 10/1812:10 am -
Nonstop3h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Southwest logo]()
$159
This iWofly deal was found by Cheapflights users on 9/21. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:51 pm -
Nonstop4h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Alaska Airlines logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Mon 10/268:00 pm -
2 stops25h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Tue 10/138:00 pm -
2 stops26h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Wed 11/184:27 pm -
2 stops23h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$161
This Super.com deal was found by Cheapflights users on 9/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:00 pm -
1 stop8h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 9/20. 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.
Thu 10/158:00 pm -
1 stop8h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$164
This Frontier deal was found by Cheapflights users on 9/18. 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.
Fri 11/204:37 pm -
1 stop6h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Wed 11/188:09 pm -
2 stops26h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Sat 10/244:27 pm -
1 stop29h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$167
Find flight deals from Seattle to Chicago
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Chicago (CHI). 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 September 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $277 (Alaska Airlines) |
One-way from | $158 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $376 |
Good round-trip deal | $356 or less |
Good one-way deal | $204 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Chicago 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 7,457,451 searches. Data last updated September 22, 2026.
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Mon 10/26
5:49 pm-11:59 pm
Nonstop4h 10m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Sat 10/24
5:50 pm-11:54 pm
Nonstop4h 04m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Thu 12/17
5:50 pm-11:57 pm
Nonstop4h 07m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Mon 11/23
11:58 pm-5:56 am
Nonstop3h 58m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Sat 10/31
7:45 am-2:00 pm
Nonstop4h 15m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Sat 11/14
5:51 pm-11:59 pm
Nonstop4h 08m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Sat 11/7
12:45 pm-10:46 pm
1 stop8h 01m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$169
SeattleChicago
SEA Seattle/Tacoma Intl - MDW Chicago Midway
SEAMDW
Seattle/Tacoma Intl
Wed 10/21
8:25 pm-5:55 am
1 stop7h 30m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$169
SeattleChicago
SEA Seattle/Tacoma Intl - MDW Chicago Midway
SEAMDW
Seattle/Tacoma Intl
Wed 11/4
5:40 am-5:20 pm
1 stop9h 40m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$169
SeattleChicago
SEA Seattle/Tacoma Intl - MDW Chicago Midway
SEAMDW
Seattle/Tacoma Intl
Mon 10/19
8:40 pm-5:40 am
1 stop7h 00m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$169
Showing 1-10 of 45 resultsSorted by cheapest first
Compare providers for flights from Seattle to Chicago
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Chicago in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Seattle-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Chicago flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from Seattle with our price prediction graph.
SEA-CHI
SEA-ORD
SEA-MDW
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.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Chicago
SEA-CHI
SEA-ORD
SEA-MDW
What is the cheapest month to book a flight from Seattle to Chicago?
Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago (average of $241). Flying from Seattle to Chicago in June is currently the most expensive (average of $412). 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 CHI?
Find hourly flight availability from Seattle to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 22, 2026.
It’s typically best to fly out from Seattle to Chicago in the evening. Doing so could potentially save you 5% on the flight price compared to flying at noon, which is usually more expensive.
Weekly flight availability from Seattle to Chicago
Explore weekly flight availability from Seattle to Chicago. 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 September 22, 2026.
The most flights from SEA to CHI are scheduled on a Friday (61 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (37 on average).
How much does it cost to fly round-trip from Seattle to Chicago?
Airfare is below average for this route at the moment.
Seattle to Chicago flights typically cost between $296 and $448 in October.The cheapest round-trip price found within the last 5 days was $277 on Alaska Airlines (Oct 16-Oct 24).
How far ahead should I book a flight from Seattle to Chicago?
The price you pay for your flight from Seattle to Chicago may vary depending on when you book. For the best chance of a lower fare, look to book 30 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Seattle to Chicago?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Chicago. Price data was last updated on September 19, 2026.
Travelers seeking maximum savings on their Seattle to Chicago flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Seattle to Chicago flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Chicago trip
Our travel experts
Reviews of airlines servicing Chicago
Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated September 22, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andDelta from Seattle to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Seattle to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Chicago?
Book flights to Chicago if you plan to visit one of these locationsBenton Harbor
Lansing
Merrillville
Valparaiso
Hammond
Saint Joseph
Porter
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Other flights to Chicago
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Seattle and Chicago flights
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Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 22, 2026.
Popular flight searches
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Top 6 airlines flying from Seattle to Chicago
Discover the top 6 airlines that operate flights from Seattle to Chicago. 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 7,457,451 searches. Data last updated September 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$168 | Average$374 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$177 | Average$376 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$177 | Average$379 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$193 | Average$313 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$195 | Average$379 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$429 | FlexibilityNo cancel fee | On-time63% |