$145+ Cheap flights from O'Hare Intl (ORD) to Seattle (SEA)
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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEA
Oct 14 — Oct 211
Round-trip
1 adult, Economy
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Find cheap flights from O'Hare Intl 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 O'Hare Intl to Seattle/Tacoma Intl are usually found in January or February, booked 35 days in advance, depart on a Friday or Wednesday and return on a Wednesday
Cheap flight deals from O'Hare Intl to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from O'Hare Intl to SeattleExplore the most affordable flight options available from O'Hare Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
Explore the most affordable flight options available from O'Hare Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
This Expedia deal was found by Cheapflights users on 9/11. 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.
Fri 11/65:15 pm -
1 stop19h 44m
Fri 11/134:27 pm -
1 stop5h 54m
Deal found 9/11![Frontier logo]()
$262
This Expedia deal was found by Cheapflights users on 9/14. 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.
Fri 10/98:01 pm -
1 stop24h 44m
Tue 10/138:00 pm -
1 stop8h 34m
Deal found 9/14![Frontier logo]()
$274
This Travelocity deal was found by Cheapflights users on 9/9. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:30 am -
1 stop10h 42m
Sun 10/259:16 pm -
1 stop30h 00m
Deal found 9/9![Frontier logo]()
$275
This Expedia deal was found by Cheapflights users on 9/14. 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.
Fri 10/98:01 pm -
1 stop24h 44m
Wed 10/148:00 pm -
1 stop8h 34m
Deal found 9/14![Frontier logo]()
$276
This Delta deal was found by Cheapflights users on 9/14. 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 10/1712:00 pm -
Nonstop4h 37m
Sat 10/245:50 pm -
Nonstop4h 04m
Deal found 9/14![Delta logo]()
$277
This CheapOair deal was found by Cheapflights users on 9/12. 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 10/61:21 pm -
1 stop22h 21m
Tue 10/138:00 pm -
1 stop8h 34m
Deal found 9/12![Frontier logo]()
$278
This Expedia deal was found by Cheapflights users on 9/14. 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.
Fri 10/97:16 pm -
Nonstop4h 43m
Wed 10/148:00 pm -
1 stop8h 34m
Deal found 9/14![Multiple Airlines logo]()
$279
This Frontier deal was found by Cheapflights users on 9/9. 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.
Sat 11/146:30 am -
1 stop10h 42m
Sun 11/224:37 pm -
1 stop6h 16m
Deal found 9/9![Frontier logo]()
$280
This Delta deal was found by Cheapflights users on 9/14. 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 10/105:48 pm -
Nonstop4h 46m
Sat 10/177:45 am -
Nonstop4h 15m
Deal found 9/14![Delta logo]()
$281
This SmartFares deal was found by Cheapflights users on 9/14. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:20 am -
1 stop9h 57m
Sat 10/1711:41 pm -
Nonstop3h 59m
Deal found 9/14![Alaska Airlines logo]()
$282
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/71:21 pm -
1 stop21h 37m
Tue 11/311:42 pm -
Nonstop3h 58m
Deal found 9/10![Multiple Airlines logo]()
$283
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:30 am -
1 stop10h 38m
Fri 10/168:00 pm -
1 stop8h 34m
Deal found 9/10![Frontier logo]()
$284
Best flights from O'Hare Intl to SeattleDiscover carefully curated flight deals from O'Hare Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
Discover carefully curated flight deals from O'Hare Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/98:12 pm -
Nonstop4h 44m
Wed 10/143:18 pm -
1 stop7h 37m
Deal found 9/14![United Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 9/10. 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 10/96:35 am -
Nonstop4h 45m
Sun 10/115:30 pm -
Nonstop4h 04m
Deal found 9/10![Delta logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:16 pm -
Nonstop4h 43m
Mon 11/25:51 pm -
Nonstop4h 08m
Deal found 9/13![Alaska Airlines logo]()
$387
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/98:12 pm -
Nonstop4h 44m
Sun 10/1111:13 pm -
Nonstop4h 06m
Deal found 9/10![United Airlines logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 10/86:00 am -
Nonstop4h 37m
Sun 10/115:49 pm -
Nonstop4h 10m
Deal found 9/11![Alaska Airlines logo]()
$393
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:00 am -
Nonstop4h 36m
Wed 10/71:56 pm -
Nonstop4h 21m
Deal found 9/10![United Airlines logo]()
$392
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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 10/102:21 pm -
1 stop9h 12m
Mon 10/128:07 pm -
1 stop15h 18m
Deal found 9/13![Alaska Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 9/12. 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 10/75:30 pm -
Nonstop4h 46m
Sat 10/1010:39 am -
Nonstop4h 14m
Deal found 9/12![Delta logo]()
$457
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/11:16 pm -
Nonstop4h 35m
Sat 10/35:07 pm -
Nonstop4h 03m
Deal found 9/11![United Airlines logo]()
$412
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:49 pm -
1 stop15h 39m
Sun 10/115:49 pm -
Nonstop4h 10m
Deal found 9/11![Alaska Airlines logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 9/291:03 pm -
Nonstop4h 38m
Fri 10/25:51 pm -
Nonstop4h 08m
Deal found 9/11![Alaska Airlines logo]()
$422
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 10/33:49 pm -
Nonstop4h 39m
Wed 10/711:56 am -
Nonstop4h 24m
Deal found 9/14![Alaska Airlines logo]()
$445
Last-minute flights from O'Hare Intl to SeattleDiscover last-minute flight deals from O'Hare Intl to Seattle. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Seattle. Data last updated September 14, 2026 and is based on user searches.
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:30 am -
1 stop10h 38m
Fri 10/168:00 pm -
1 stop8h 34m
Deal found 9/10![Frontier logo]()
$284
This CheapOair deal was found by Cheapflights users on 9/12. 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 10/61:21 pm -
1 stop22h 21m
Tue 10/138:00 pm -
1 stop8h 34m
Deal found 9/12![Frontier logo]()
$278
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/71:21 pm -
1 stop21h 37m
Tue 11/311:42 pm -
Nonstop3h 58m
Deal found 9/10![Multiple Airlines logo]()
$283
This Booking.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:00 am -
Nonstop4h 37m
Sat 10/108:00 pm -
1 stop8h 34m
Deal found 9/14![Multiple Airlines logo]()
$285
This Expedia deal was found by Cheapflights users on 9/14. 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.
Fri 10/98:01 pm -
1 stop24h 44m
Tue 10/138:00 pm -
1 stop8h 34m
Deal found 9/14![Frontier logo]()
$274
This Expedia deal was found by Cheapflights users on 9/14. 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.
Fri 10/98:01 pm -
1 stop24h 44m
Wed 10/148:00 pm -
1 stop8h 34m
Deal found 9/14![Frontier logo]()
$276
This Expedia deal was found by Cheapflights users on 9/14. 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.
Fri 10/97:16 pm -
Nonstop4h 43m
Wed 10/148:00 pm -
1 stop8h 34m
Deal found 9/14![Multiple Airlines logo]()
$279
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:00 am -
Nonstop4h 37m
Tue 10/138:00 pm -
1 stop8h 34m
Deal found 9/14![Multiple Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 9/14. 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 10/105:48 pm -
Nonstop4h 46m
Sat 10/177:45 am -
Nonstop4h 15m
Deal found 9/14![Delta logo]()
$281
This SmartFares deal was found by Cheapflights users on 9/14. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:20 am -
1 stop9h 57m
Sat 10/1711:41 pm -
Nonstop3h 59m
Deal found 9/14![Alaska Airlines logo]()
$282
This Delta deal was found by Cheapflights users on 9/14. 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 10/1712:00 pm -
Nonstop4h 37m
Sat 10/245:50 pm -
Nonstop4h 04m
Deal found 9/14![Delta logo]()
$277
This Travelocity deal was found by Cheapflights users on 9/9. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:30 am -
1 stop10h 42m
Sun 10/259:16 pm -
1 stop30h 00m
Deal found 9/9![Frontier logo]()
$275
One-way flights from O'Hare Intl to SeattleSearch for one-way flight options from O'Hare Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
Search for one-way flight options from O'Hare Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Wed 9/306:30 am -
2 stops40h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$145
This Priceline deal was found by Cheapflights users on 9/14. 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.
Tue 10/136:30 am -
1 stop10h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$149
This Super.com deal was found by Cheapflights users on 9/14. 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 10/263:30 pm -
1 stop21h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Mon 10/510:26 am -
2 stops30h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 12/25:05 am -
2 stops13h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$154
This Booking.com deal was found by Cheapflights users on 9/14. 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.
Tue 10/66:30 am -
1 stop10h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$155
This Super.com deal was found by Cheapflights users on 9/12. 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 11/125:15 pm -
1 stop18h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Frontier logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 10/87:16 pm -
Nonstop4h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Alaska Airlines logo]()
$159
This Super.com deal was found by Cheapflights users on 9/14. 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.
Wed 10/148:01 pm -
1 stop24h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$160
Find flight deals from O'Hare Intl to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) 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 September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $262 (Expedia) |
One-way from | $145 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $367 |
Good round-trip deal | $358 or less |
Good one-way deal | $212 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from O'Hare Intl 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 September 14, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport 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
Mon 11/9
12:58 pm-3:36 pm
Nonstop4h 38m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$159
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 11/11
6:35 pm-9:29 pm
Nonstop4h 54m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$159
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Mon 10/5
5:44 pm-8:20 pm
Nonstop4h 36m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$159
Quickest round-trip
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Thu 11/5
12:50 pm-3:25 pm
Nonstop4h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$159
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Fri 10/2
12:50 pm-3:25 pm
Nonstop4h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$170
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Sat 12/12
3:09 pm-5:51 pm
Nonstop4h 42m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$189
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 10/21
7:20 am-5:33 pm
2 stops12h 13m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$196
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Tue 11/10
2:15 pm-9:29 pm
1 stop9h 14m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$199
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Sun 10/18
7:00 am-9:38 am
Nonstop4h 38m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$215
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Thu 9/24
7:00 am-9:35 am
Nonstop4h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$234
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from O'Hare Intl 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 O'Hare Intl to Seattle 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*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-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 O'Hare Intl Airport-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 O'Hare Intl to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from O'Hare Intl with our price prediction graph.
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 O'Hare Intl Airport to Seattle
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How far ahead should I book a flight from Chicago O'Hare Intl Airport to Seattle?
The price you pay for your flight from Chicago O'Hare Intl Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 34 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Seattle?
Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Seattle (average of $214). Flying from Chicago O'Hare Intl Airport to Seattle in July is currently the most expensive (average of $408). 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 ORD to SEA?
Find hourly flight availability from O'Hare Intl 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 September 14, 2026.
One of the essential ways to save on airfare from Chicago O'Hare Intl Airport to Seattle is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 8% on airfare.
What is the cheapest day to fly from Chicago O'Hare Intl Airport to Seattle?
Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Seattle. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Seattle flight should consider departing on Friday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
What’s the top layover airport for flights from Chicago O'Hare Intl Airport to Seattle?
Share of 1-stop round-trip flights from Chicago O'Hare Intl Airport to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Denver (DEN) – chosen by Cheapflights users on 50% of 1-stop itineraries from Chicago O'Hare Intl Airport to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Chicago O'Hare Intl Airport to Seattle?
Average round-trip fare for 1-stop flights from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Seattle?
Shortest average travel time for 1-stop one-way flights from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Seattle?
Average layover duration for 1-stop one-way flights from Chicago O'Hare Intl Airport 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.
The best insider tips for Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 September 14, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited Airlines from Chicago O'Hare Intl Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl 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
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O'Hare Intl and Seattle flights
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Top 5 airlines flying from O'Hare Intl to Seattle
Discover the top 5 airlines that operate flights from O'Hare Intl 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 September 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$131 | Average$272 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$361 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$177 | Average$356 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$376 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$188 | Average$381 | FlexibilityNo cancel fee | On-time69% |