$154+ Cheap flights from Chicago (CHI) to Seattle (SEA)
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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
Sep 24 — Oct 11
Round-trip
1 adult, Economy
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Find cheap flights from Chicago to Seattle 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 Chicago to Seattle/Tacoma Intl are usually found in January or February, booked 39 days in advance, depart on a Friday or Wednesday and return on a Wednesday
Cheap flight deals from Chicago to Seattle
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Cheapest flights from Chicago to SeattleExplore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 25, 2026.
Explore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Thu 10/226:30 am -
1 stop10h 42m
Wed 10/288:09 pm -
2 stops26h 12m
Deal found 8/20![Frontier logo]()
$282
This Travelocity deal was found by Cheapflights users on 8/24. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:21 pm -
1 stop22h 21m
Tue 9/226:00 am -
Nonstop4h 07m
Deal found 8/24![Multiple Airlines logo]()
$283
This lol.travel deal was found by Cheapflights users on 8/23. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/192:18 pm -
1 stop9h 22m
Sat 9/265:51 pm -
Nonstop4h 08m
Deal found 8/23![Alaska Airlines logo]()
$284
This lol.travel deal was found by Cheapflights users on 8/22. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 pm -
Nonstop4h 38m
Sat 9/197:40 am -
1 stop9h 41m
Deal found 8/22![Alaska Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 10/75:46 pm -
Nonstop4h 42m
Wed 10/148:00 pm -
1 stop8h 34m
Deal found 8/23![Multiple Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 8/20. 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.
Sat 9/126:25 pm -
Nonstop4h 30m
Sat 9/194:35 pm -
1 stop10h 25m
Deal found 8/20![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 8/24. 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 9/195:44 pm -
Nonstop4h 36m
Thu 9/245:50 pm -
Nonstop4h 07m
Deal found 8/24![Delta logo]()
$287
This CheapOair deal was found by Cheapflights users on 8/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:30 am -
1 stop10h 38m
Wed 9/309:45 pm -
1 stop29h 53m
Deal found 8/22![Frontier logo]()
$288
This Orbitz deal was found by Cheapflights users on 8/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:30 am -
1 stop10h 42m
Mon 10/2610:20 am -
1 stop11h 39m
Deal found 8/21![Multiple Airlines logo]()
$289
This Trip.com deal was found by Cheapflights users on 8/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:16 pm -
Nonstop4h 43m
Thu 10/158:00 pm -
1 stop8h 34m
Deal found 8/24![Multiple Airlines logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:55 pm -
1 stop14h 47m
Mon 10/1211:41 pm -
Nonstop3h 59m
Deal found 8/21![Multiple Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 8/20. 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 10/66:05 am -
2 stops9h 30m
Mon 10/1212:10 am -
Nonstop3h 55m
Deal found 8/20![Southwest logo]()
$292
Best flights from Chicago to SeattleDiscover carefully curated flight deals from Chicago to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 25, 2026.
Discover carefully curated flight deals from Chicago to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 25, 2026.
This Delta deal was found by Cheapflights users on 8/24. 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 9/2612:50 pm -
Nonstop4h 35m
Mon 9/2811:45 am -
Nonstop4h 16m
Deal found 8/24![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:10 am -
2 stops9h 20m
Wed 9/305:20 am -
Nonstop3h 55m
Deal found 8/22![Southwest logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 8/20. 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 9/298:00 am -
Nonstop4h 34m
Sat 10/37:04 am -
1 stop9h 49m
Deal found 8/20![Alaska Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 8/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:00 am -
Nonstop4h 36m
Mon 10/55:07 pm -
Nonstop4h 03m
Deal found 8/20![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 8/20. 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.
Sat 9/129:55 am -
2 stops9h 50m
Wed 9/165:20 am -
Nonstop3h 55m
Deal found 8/20![Southwest logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 10/247:00 am -
Nonstop4h 42m
Mon 11/27:13 am -
1 stop9h 46m
Deal found 8/24![Alaska Airlines logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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.
Thu 10/295:46 pm -
Nonstop4h 42m
Mon 11/25:51 pm -
Nonstop4h 08m
Deal found 8/24![Alaska Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 8/24. 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 11/210:00 pm -
Nonstop4h 40m
Tue 11/34:40 pm -
2 stops11h 05m
Deal found 8/24![Southwest logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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 9/231:03 pm -
Nonstop4h 38m
Mon 9/288:49 pm -
1 stop20h 32m
Deal found 8/22![Alaska Airlines logo]()
$300
This Southwest deal was found by Cheapflights users on 8/20. 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 9/278:35 pm -
Nonstop4h 40m
Sat 10/105:15 pm -
1 stop9h 45m
Deal found 8/20![Southwest logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 8/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:00 am -
Nonstop4h 44m
Tue 10/208:35 pm -
1 stop14h 50m
Deal found 8/21![Alaska Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/23. 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 10/810:05 pm -
Nonstop4h 30m
Sat 10/105:15 pm -
1 stop9h 45m
Deal found 8/23![Southwest logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 8/20. 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.
Thu 9/247:00 pm -
Nonstop4h 38m
Mon 9/288:49 pm -
1 stop14h 33m
Deal found 8/20![Alaska Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/24. 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 10/810:05 pm -
Nonstop4h 30m
Wed 10/1412:10 am -
Nonstop3h 55m
Deal found 8/24![Southwest logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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.
Mon 9/146:00 am -
Nonstop4h 30m
Mon 9/288:49 pm -
1 stop14h 33m
Deal found 8/22![Alaska Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:20 pm -
Nonstop4h 35m
Fri 9/185:15 am -
Nonstop4h 00m
Deal found 8/22![Southwest logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 8/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:57 pm -
1 stop15h 31m
Mon 11/911:42 pm -
Nonstop3h 58m
Deal found 8/21![Alaska Airlines logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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.
Thu 10/226:00 am -
Nonstop4h 37m
Mon 10/269:08 pm -
1 stop14h 17m
Deal found 8/24![Alaska Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/24. 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 10/302:30 pm -
2 stops10h 00m
Tue 11/34:40 pm -
2 stops11h 05m
Deal found 8/24![Southwest logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 8/20. 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.
Sat 10/319:00 am -
Nonstop4h 44m
Tue 11/39:59 pm -
1 stop13h 10m
Deal found 8/20![Alaska Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 8/23. 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 12/52:05 pm -
Nonstop4h 40m
Tue 12/86:30 am -
Nonstop3h 55m
Deal found 8/23![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 8/23. 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 10/810:05 pm -
Nonstop4h 30m
Sat 10/1012:10 am -
Nonstop3h 55m
Deal found 8/23![Southwest logo]()
$357
Last-minute flights from Chicago to SeattleDiscover last-minute flight deals from Chicago to Seattle. Data last updated August 25, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Seattle. Data last updated August 25, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 8/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/292:41 pm -
1 stop20h 38m
Mon 8/317:06 pm -
1 stop16h 30m
Deal found 8/21![Frontier logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 8/292:41 pm -
1 stop20h 38m
Sat 9/511:54 am -
2 stops30h 21m
Deal found 8/24![Frontier logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Tue 9/12:41 pm -
1 stop20h 38m
Wed 9/94:27 pm -
1 stop29h 56m
Deal found 8/20![Frontier logo]()
$332
This Southwest deal was found by Cheapflights users on 8/21. 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.
Sat 9/126:25 pm -
Nonstop4h 30m
Sat 9/194:35 pm -
1 stop10h 25m
Deal found 8/21![Southwest logo]()
$287
This Southwest deal was found by Cheapflights users on 8/20. 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.
Sat 9/129:55 am -
2 stops9h 50m
Wed 9/166:40 am -
2 stops7h 25m
Deal found 8/20![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 8/20. 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.
Mon 9/149:20 pm -
Nonstop4h 35m
Thu 9/1712:35 pm -
2 stops8h 50m
Deal found 8/20![Southwest logo]()
$322
This Southwest deal was found by Cheapflights users on 8/21. 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 9/169:00 pm -
Nonstop4h 40m
Mon 9/217:25 pm -
1 stop8h 15m
Deal found 8/21![Southwest logo]()
$307
This Southwest deal was found by Cheapflights users on 8/24. 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 9/169:00 pm -
Nonstop4h 40m
Fri 9/1811:05 pm -
Nonstop4h 00m
Deal found 8/24![Southwest logo]()
$317
This Southwest deal was found by Cheapflights users on 8/24. 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 9/1910:00 am -
1 stop8h 50m
Sat 9/263:35 pm -
2 stops12h 10m
Deal found 8/24![Southwest logo]()
$308
This Southwest deal was found by Cheapflights users on 8/20. 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.
Fri 9/259:20 pm -
Nonstop4h 35m
Sat 10/35:15 pm -
1 stop9h 45m
Deal found 8/20![Southwest logo]()
$323
This Southwest deal was found by Cheapflights users on 8/24. 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 9/268:00 am -
2 stops10h 50m
Wed 9/305:20 am -
Nonstop3h 55m
Deal found 8/24![Southwest logo]()
$292
This Southwest deal was found by Cheapflights users on 8/24. 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 9/268:00 am -
2 stops10h 50m
Mon 9/285:50 pm -
1 stop8h 40m
Deal found 8/24![Southwest logo]()
$312
One-way flights from Chicago to SeattleSearch for one-way flight options from Chicago to Seattle. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.
Search for one-way flight options from Chicago to Seattle. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.
This Southwest deal was found by Cheapflights users on 8/21. 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.
Tue 10/206:05 am -
2 stops9h 30m
Deal found 8/21![Southwest logo]()
$154
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/2412:55 pm -
1 stop9h 42m
Deal found 8/23![United Airlines logo]()
$154
This Super.com deal was found by Cheapflights users on 8/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:55 pm -
1 stop14h 47m
Deal found 8/20![Frontier logo]()
$157
This Super.com deal was found by Cheapflights users on 8/24. 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 10/183:30 pm -
1 stop20h 18m
Deal found 8/24![Frontier logo]()
$158
This Southwest deal was found by Cheapflights users on 8/24. 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 9/288:00 am -
1 stop7h 55m
Deal found 8/24![Southwest logo]()
$159
This Super.com deal was found by Cheapflights users on 8/23. 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 9/278:55 pm -
1 stop14h 47m
Deal found 8/23![Frontier logo]()
$159
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:15 am -
2 stops14h 40m
Deal found 8/22![Southwest logo]()
$160
This Super.com deal was found by Cheapflights users on 8/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:41 pm -
1 stop20h 38m
Deal found 8/20![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 8/23. 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.
Sun 10/256:30 am -
1 stop10h 42m
Deal found 8/23![Frontier logo]()
$161
This Southwest deal was found by Cheapflights users on 8/20. 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.
Thu 10/229:30 pm -
1 stop11h 55m
Deal found 8/20![Southwest logo]()
$164
This Booking.com deal was found by Cheapflights users on 8/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:17 pm -
1 stop15h 03m
Deal found 8/20![Alaska Airlines logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 9/283:50 pm -
2 stops25h 18m
Deal found 8/24![Frontier logo]()
$165
Find flight deals from Chicago to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Seattle (SEA). 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 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $282 (Kiwi.com) |
One-way from | $154 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $380 |
Good round-trip deal | $317 or less |
Good one-way deal | $213 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 25, 2026.
Use the filters below to find and compare flights from Chicago to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Sat 9/26
12:50 pm-3:25 pm
Nonstop4h 35m
Seattle/Tacoma Intl
Mon 9/28
11:45 am-6:01 pm
Nonstop4h 16m
$287
ChicagoSeattle
MDW Chicago Midway - SEA Seattle/Tacoma Intl
MDWSEA
Chicago Midway
Tue 9/22
10:10 am-5:30 pm
2 stops9h 20m
Seattle/Tacoma Intl
Wed 9/30
5:20 am-11:15 am
Nonstop3h 55m
$292
ChicagoSeattle
MDW Chicago Midway - SEA Seattle/Tacoma Intl
MDWSEA
Chicago Midway
Sat 9/12
9:55 am-5:45 pm
2 stops9h 50m
Seattle/Tacoma Intl
Wed 9/16
5:20 am-11:15 am
Nonstop3h 55m
$292
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Tue 9/29
8:00 am-10:34 am
Nonstop4h 34m
Seattle/Tacoma Intl
Sat 10/3
7:04 am-6:53 pm
1 stop9h 49m
$297
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Thu 9/24
7:00 am-9:36 am
Nonstop4h 36m
Seattle/Tacoma Intl
Mon 10/5
5:07 pm-11:10 pm
Nonstop4h 03m
$297
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Sat 10/24
7:00 am-9:42 am
Nonstop4h 42m
Seattle/Tacoma Intl
Mon 11/2
7:13 am-6:59 pm
1 stop9h 46m
$297
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Thu 10/29
5:46 pm-8:28 pm
Nonstop4h 42m
Seattle/Tacoma Intl
Mon 11/2
5:51 pm-11:59 pm
Nonstop4h 08m
$297
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 9/23
1:03 pm-3:41 pm
Nonstop4h 38m
Seattle/Tacoma Intl
Mon 9/28
8:49 pm-7:21 pm
1 stop20h 32m
$300
ChicagoSeattle
MDW Chicago Midway - SEA Seattle/Tacoma Intl
MDWSEA
Chicago Midway
Mon 11/2
10:00 pm-12:40 am
Nonstop4h 40m
Seattle/Tacoma Intl
Tue 11/3
4:40 pm-5:45 am
2 stops11h 05m
$302
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Thu 10/15
9:00 am-11:44 am
Nonstop4h 44m
Seattle/Tacoma Intl
Tue 10/20
8:35 pm-1:25 pm
1 stop14h 50m
$307
Showing 1-10 of 44 resultsSorted by cheapest first
Compare providers for flights from Chicago to Seattle
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 Chicago to Seattle in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago-Seattle 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 Chicago-Seattle 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 Chicago to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Chicago with our price prediction graph.
CHI-SEA
MDW-SEA
ORD-SEA
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 Chicago to Seattle
CHI-SEA
MDW-SEA
ORD-SEA
What is the cheapest month to book a flight from Chicago to Seattle?
Currently, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of $223). Flying from Chicago to Seattle in July 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 CHI to SEA?
Find hourly flight availability from Chicago to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 25, 2026.
It’s typically best to fly out from Chicago to Seattle in the evening. Doing so could potentially save you 29% on the flight price compared to flying at noon, which is usually more expensive.
Weekly flight availability from Chicago to Seattle
Explore weekly flight availability from Chicago to Seattle. 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 25, 2026.
The most flights from CHI to SEA are scheduled on a Friday (55 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (40 on average).
How much does it cost to fly round-trip from Chicago to Seattle?
Airfare is below average for this route at the moment.
Chicago to Seattle flights typically cost between $306 and $431 in October.The cheapest round-trip price found within the last 5 days was $282 on Frontier (Oct 22-Oct 28).
What’s the top layover airport for flights from Chicago to Seattle?
Share of 1-stop round-trip flights from Chicago to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Denver (DEN) – chosen by Cheapflights users on 67% of 1-stop itineraries from Chicago to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Chicago to Seattle?
Average round-trip fare for 1-stop flights from Chicago to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $240.
What’s the fastest layover option from Chicago to Seattle?
Shortest average travel time for 1-stop one-way flights from Chicago to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Las Vegas (LAS) have the shortest average one-way travel time for 1-stop routes: 12h 27m.
Which airport typically offers the quickest layover for flights from Chicago to Seattle?
Average layover duration for 1-stop one-way flights from Chicago to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Las Vegas (LAS) offer the fastest connection on this route, with an average layover time of 10h 36m.
How far ahead should I book a flight from Chicago to Seattle?
The best time to book flights from Chicago to Seattle is 90 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from Chicago to Seattle?
Use this chart to determine the cheapest time to fly round-trip from Chicago to Seattle. Price data was last updated on August 22, 2026.
Travelers seeking maximum savings on their Chicago to Seattle flight should consider departing on Sunday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Chicago to Seattle 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 Chicago to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated August 25, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Chicago to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Related info for your journey
Find useful and relevant information for your journey from Chicago to Seattle. 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 Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Tukwila
Olympia
Edmonds
Snoqualmie
Lynnwood
Centralia
Puyallup
Kent
Tumwater
Ellensburg
Marysville
Ocean Shores
Lakewood
Fife
Poulsbo
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Search flights from Chicago to Seattle by cabin class
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Chicago and Seattle flights
Browse other Chicago and Seattle flight options. Last updated on August 25, 2026.
Other flights from Chicago
Browse through other flights departing from Chicago. Flights are based on user searches made on Cheapflights and were last updated on August 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 25, 2026.
Top 7 airlines flying from Chicago to Seattle
Discover the top 7 airlines that operate flights from Chicago to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$104 | Average$337 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$131 | Average$272 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$357 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$177 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$179 | Average$415 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$186 | Average$370 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$227 | Average$376 | FlexibilityNo cancel fee | On-time63% |