$152+ Cheap flights from Seattle (SEA) to Chicago (CHI)
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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
Sep 9 — Sep 161
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 80 days in advance, depart on a Thursday or Wednesday 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 August 10, 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 August 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/154:27 pm -
2 stops19h 50m
Tue 9/296:30 am -
1 stop10h 38m
Deal found 8/7![Frontier logo]()
$283
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:05 pm -
Nonstop4h 00m
Fri 9/119:20 pm -
Nonstop4h 35m
Deal found 8/9![Southwest logo]()
$283
This CheapOair deal was found by Cheapflights users on 8/7. 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 9/179:45 pm -
1 stop29h 53m
Sun 9/208:55 pm -
1 stop14h 47m
Deal found 8/7![Frontier logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 9/57:06 pm -
1 stop16h 30m
Wed 9/166:30 am -
1 stop10h 38m
Deal found 8/6![Frontier logo]()
$285
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:30 pm -
1 stop7h 30m
Mon 9/149:20 pm -
Nonstop4h 35m
Deal found 8/9![Southwest logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 8/287:06 pm -
1 stop16h 30m
Wed 9/22:41 pm -
1 stop20h 38m
Deal found 8/7![Frontier logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Fri 9/187:45 pm -
1 stop7h 53m
Tue 9/226:30 am -
1 stop10h 38m
Deal found 8/9![Frontier logo]()
$287
This CheapOair deal was found by Cheapflights users on 8/7. 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.
Sat 8/297:06 pm -
1 stop16h 30m
Mon 8/318:11 pm -
1 stop16h 28m
Deal found 8/7![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 8/257:06 pm -
1 stop16h 30m
Fri 8/282:41 pm -
1 stop20h 38m
Deal found 8/5![Frontier logo]()
$289
This Southwest deal was found by Cheapflights users on 8/10. 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 9/193:35 pm -
2 stops12h 10m
Mon 9/285:55 am -
1 stop10h 00m
Deal found 8/10![Southwest logo]()
$289
This Frontier deal was found by Cheapflights users on 8/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:45 pm -
1 stop7h 53m
Thu 10/18:55 pm -
1 stop14h 47m
Deal found 8/10![Frontier logo]()
$290
This Frontier deal was found by Cheapflights users on 8/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:45 pm -
1 stop7h 53m
Mon 9/146:30 am -
1 stop10h 38m
Deal found 8/9![Frontier logo]()
$291
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 August 10, 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 August 10, 2026.
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:25 pm -
1 stop8h 15m
Sat 9/198:00 am -
2 stops10h 50m
Deal found 8/9![Southwest logo]()
$343
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Wed 9/239:45 pm -
1 stop20h 54m
Sun 9/279:29 pm -
1 stop14h 13m
Deal found 8/9![Multiple Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 8/5. 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 8/2910:50 am -
Nonstop4h 10m
Tue 9/85:44 pm -
Nonstop4h 36m
Deal found 8/5![Delta logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:16 am -
Nonstop4h 04m
Sat 9/261:03 pm -
Nonstop4h 38m
Deal found 8/8![Alaska Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Tue 9/811:00 pm -
Nonstop4h 06m
Wed 9/164:30 pm -
Nonstop4h 45m
Deal found 8/9![United Airlines logo]()
$377
This JetBlue deal was found by Cheapflights users on 8/7. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:40 pm -
1 stop10h 18m
Fri 10/210:59 am -
1 stop11h 45m
Deal found 8/7![JetBlue logo]()
$389
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:30 am -
1 stop6h 40m
Mon 8/319:20 pm -
Nonstop4h 35m
Deal found 8/9![Southwest logo]()
$366
This Delta deal was found by Cheapflights users on 8/9. 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.
Wed 9/167:15 am -
Nonstop4h 14m
Tue 9/2912:50 pm -
Nonstop4h 35m
Deal found 8/9![Delta logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/5. 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 10/105:10 pm -
Nonstop4h 04m
Mon 10/128:12 pm -
Nonstop4h 44m
Deal found 8/5![United Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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.
Mon 9/1412:16 am -
Nonstop4h 04m
Sun 9/206:00 am -
Nonstop4h 30m
Deal found 8/7![Alaska Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/174:27 pm -
2 stops23h 44m
Sun 9/209:29 pm -
1 stop14h 13m
Deal found 8/7![Multiple Airlines logo]()
$400
This Delta deal was found by Cheapflights users on 8/5. 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 10/1710:39 am -
Nonstop4h 14m
Sat 10/245:30 pm -
Nonstop4h 46m
Deal found 8/5![Delta logo]()
$377
This Southwest deal was found by Cheapflights users on 8/7. 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 9/165:20 am -
Nonstop3h 55m
Sat 9/196:25 pm -
Nonstop4h 30m
Deal found 8/7![Southwest logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/5. 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 10/911:13 pm -
Nonstop4h 06m
Tue 10/137:00 am -
Nonstop4h 36m
Deal found 8/5![United Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/169:45 pm -
1 stop20h 54m
Sun 9/209:29 pm -
1 stop14h 13m
Deal found 8/7![Multiple Airlines logo]()
$410
This Delta deal was found by Cheapflights users on 8/7. 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 9/610:50 am -
Nonstop4h 10m
Sun 9/137:00 am -
Nonstop4h 35m
Deal found 8/7![Delta logo]()
$383
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:05 pm -
Nonstop4h 00m
Tue 9/1510:10 am -
2 stops9h 20m
Deal found 8/9![Southwest logo]()
$392
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Wed 8/267:06 pm -
2 stops18h 03m
Sun 8/309:35 pm -
1 stop15h 04m
Deal found 8/8![Multiple Airlines logo]()
$431
This Delta deal was found by Cheapflights users on 8/10. 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.
Fri 9/185:50 pm -
Nonstop4h 07m
Sat 9/267:00 am -
Nonstop4h 35m
Deal found 8/10![Delta logo]()
$393
This Southwest deal was found by Cheapflights users on 8/7. 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 9/52:20 pm -
2 stops13h 35m
Fri 9/1110:25 am -
2 stops9h 10m
Deal found 8/7![Southwest logo]()
$393
This Delta deal was found by Cheapflights users on 8/9. 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 9/137:15 am -
Nonstop4h 14m
Sat 9/267:00 am -
Nonstop4h 35m
Deal found 8/9![Delta logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/272:37 pm -
2 stops18h 46m
Sun 8/309:35 pm -
1 stop15h 04m
Deal found 8/8![Multiple Airlines logo]()
$436
This Southwest deal was found by Cheapflights users on 8/6. 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 9/1911:00 pm -
1 stop7h 45m
Sat 9/268:00 am -
2 stops10h 50m
Deal found 8/6![Southwest logo]()
$402
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:55 pm -
1 stop8h 00m
Wed 9/1612:20 pm -
2 stops8h 55m
Deal found 8/9![Southwest logo]()
$402
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Wed 8/267:06 pm -
2 stops18h 03m
Thu 9/39:29 pm -
1 stop15h 10m
Deal found 8/8![Multiple Airlines logo]()
$473
This Southwest deal was found by Cheapflights users on 8/5. 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 9/107:10 pm -
1 stop8h 45m
Sun 9/132:40 pm -
Nonstop4h 25m
Deal found 8/5![Southwest logo]()
$403
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Sun 10/44:27 pm -
2 stops18h 40m
Thu 10/89:03 pm -
1 stop14h 57m
Deal found 8/6![Multiple Airlines logo]()
$479
This Southwest deal was found by Cheapflights users on 8/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/612:10 am -
Nonstop3h 55m
Sun 10/115:15 am -
1 stop7h 40m
Deal found 8/8![Southwest logo]()
$403
This Southwest deal was found by Cheapflights users on 8/6. 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 8/2811:05 pm -
Nonstop4h 00m
Mon 8/319:20 pm -
Nonstop4h 35m
Deal found 8/6![Southwest logo]()
$407
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Wed 9/27:06 pm -
2 stops17h 57m
Sun 9/69:29 pm -
1 stop15h 10m
Deal found 8/9![Multiple Airlines logo]()
$494
Last-minute flights from Seattle to ChicagoDiscover last-minute flight deals from Seattle to Chicago. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Chicago. Data last updated August 10, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 8/5. 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.
Tue 8/187:06 pm -
1 stop16h 30m
Sat 8/292:41 pm -
1 stop20h 38m
Deal found 8/5![Frontier logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 8/187:06 pm -
1 stop16h 30m
Wed 8/265:59 pm -
2 stops41h 20m
Deal found 8/5![Frontier logo]()
$308
This Super.com deal was found by Cheapflights users on 8/5. 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.
Tue 8/187:06 pm -
1 stop16h 30m
Fri 8/218:11 pm -
1 stop16h 28m
Deal found 8/5![Frontier logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 8/187:06 pm -
1 stop16h 30m
Tue 8/252:41 pm -
1 stop20h 38m
Deal found 8/5![Frontier logo]()
$324
This CheapOair deal was found by Cheapflights users on 8/5. 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.
Wed 8/1910:34 am -
1 stop17h 25m
Wed 8/262:41 pm -
1 stop20h 38m
Deal found 8/5![Frontier logo]()
$293
This CheapOair deal was found by Cheapflights users on 8/6. 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.
Wed 8/198:53 pm -
1 stop20h 09m
Fri 8/218:11 pm -
1 stop16h 28m
Deal found 8/6![Frontier logo]()
$328
This CheapOair deal was found by Cheapflights users on 8/7. 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 8/209:29 pm -
1 stop19h 33m
Mon 8/318:11 pm -
1 stop16h 28m
Deal found 8/7![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 8/209:29 pm -
1 stop19h 33m
Tue 8/252:41 pm -
1 stop20h 38m
Deal found 8/5![Frontier logo]()
$336
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:05 pm -
Nonstop4h 00m
Fri 9/119:20 pm -
Nonstop4h 35m
Deal found 8/9![Southwest logo]()
$283
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:30 pm -
1 stop7h 30m
Mon 9/149:20 pm -
Nonstop4h 35m
Deal found 8/9![Southwest logo]()
$285
This Southwest deal was found by Cheapflights users on 8/10. 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 9/193:35 pm -
2 stops12h 10m
Mon 9/285:55 am -
1 stop10h 00m
Deal found 8/10![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:05 pm -
Nonstop4h 00m
Mon 9/289:20 pm -
Nonstop4h 35m
Deal found 8/9![Southwest logo]()
$296
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 August 10, 2026.
Search for one-way flight options from Seattle to Chicago. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Super.com deal was found by Cheapflights users on 8/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:06 pm -
1 stop16h 30m
Deal found 8/9![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/2210:57 am -
1 stop16h 41m
Deal found 8/5![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 stops19h 50m
Deal found 8/6![Frontier logo]()
$154
This Super.com deal was found by Cheapflights users on 8/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:29 pm -
1 stop19h 33m
Deal found 8/8![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Mon 10/54:27 pm -
2 stops23h 19m
Deal found 8/8![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Tue 11/109:16 pm -
2 stops10h 45m
Deal found 8/9![Frontier logo]()
$156
This Super.com deal was found by Cheapflights users on 8/7. 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.
Tue 8/187:06 pm -
1 stop16h 30m
Deal found 8/7![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 10/68:15 pm -
2 stops36h 43m
Deal found 8/6![Frontier logo]()
$158
This CheapOair deal was found by Cheapflights users on 8/9. 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 9/39:29 pm -
1 stop19h 33m
Deal found 8/9![Frontier logo]()
$159
This Booking.com deal was found by Cheapflights users on 8/5. 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.
Wed 8/1910:34 am -
1 stop17h 25m
Deal found 8/5![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Thu 10/110:53 am -
2 stops16h 45m
Deal found 8/10![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 10/97:41 pm -
2 stops37h 17m
Deal found 8/7![Frontier logo]()
$161
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 August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $283 (Kiwi.com) |
One-way from | $152 (Super.com) |
Popular in | June |
Cheapest in | February |
Average price | $369 |
Good round-trip deal | $379 or less |
Good one-way deal | $209 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 2,558,603 searches. Data last updated August 10, 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 - MDW Chicago Midway
SEAMDW
Seattle/Tacoma Intl
Thu 9/10
7:25 pm-5:40 am
1 stop8h 15m
Chicago Midway
Sat 9/19
8:00 am-4:50 pm
2 stops10h 50m
$343
SeattleChicago
SEA Seattle/Tacoma Intl - RFD Chicago Greater Rockford
SEARFD
Seattle/Tacoma Intl
Wed 9/23
9:45 pm-8:39 pm
1 stop20h 54m
Chicago Greater Rockford
Sun 9/27
9:29 pm-9:42 am
1 stop14h 13m
$358
SeattleChicago
SEA Seattle/Tacoma Intl - MDW Chicago Midway
SEAMDW
Seattle/Tacoma Intl
Sat 8/29
5:30 am-2:10 pm
1 stop6h 40m
Chicago Midway
Mon 8/31
9:20 pm-11:55 pm
Nonstop4h 35m
$366
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Sat 8/29
10:50 am-5:00 pm
Nonstop4h 10m
Chicago O'Hare Intl
Tue 9/8
5:44 pm-8:20 pm
Nonstop4h 36m
$377
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Mon 9/21
12:16 am-6:20 am
Nonstop4h 04m
Chicago O'Hare Intl
Sat 9/26
1:03 pm-3:41 pm
Nonstop4h 38m
$377
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Tue 9/8
11:00 pm-5:06 am
Nonstop4h 06m
Chicago O'Hare Intl
Wed 9/16
4:30 pm-7:15 pm
Nonstop4h 45m
$377
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Wed 9/16
7:15 am-1:29 pm
Nonstop4h 14m
Chicago O'Hare Intl
Tue 9/29
12:50 pm-3:25 pm
Nonstop4h 35m
$377
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Sat 10/10
5:10 pm-11:14 pm
Nonstop4h 04m
Chicago O'Hare Intl
Mon 10/12
8:12 pm-10:56 pm
Nonstop4h 44m
$377
SeattleChicago
SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl
SEAORD
Seattle/Tacoma Intl
Sat 10/17
10:39 am-4:53 pm
Nonstop4h 14m
Chicago O'Hare Intl
Sat 10/24
5:30 pm-8:16 pm
Nonstop4h 46m
$377
Quickest round-trip
SeattleChicago
SEA Seattle/Tacoma Intl - MDW Chicago Midway
SEAMDW
Seattle/Tacoma Intl
Wed 9/16
5:20 am-11:15 am
Nonstop3h 55m
Chicago Midway
Sat 9/19
6:25 pm-8:55 pm
Nonstop4h 30m
$377
Showing 1-10 of 59 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 August.
| 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-MDW
SEA-ORD
SEA-RFD
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-MDW
SEA-ORD
SEA-RFD
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 $239). 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 August 10, 2026.
It’s typically best to fly out from Seattle to Chicago at noon. Doing so could potentially save you 10% on the flight price compared to flying in the morning, 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 August 10, 2026.
The most flights from SEA to CHI are scheduled on a Saturday (62 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (36 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 $337 and $447 in September.The cheapest round-trip price found within the last 5 days was $283 on Frontier (Sep 15-Sep 29).
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 60 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 August 1, 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 August 10, 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.
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
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
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Other flights to Chicago
Explore flights to Chicago departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.
Complete your trip
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Search flights from Seattle to Chicago by cabin class
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Seattle and Chicago flights
Browse other Seattle and Chicago flight options. Last updated on August 10, 2026.
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 August 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 2,558,603 searches. Data last updated August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$177 | Average$367 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$182 | Average$373 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$184 | Average$367 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$193 | Average$310 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$239 | Average$383 | FlexibilityNo cancel fee | On-time63% |