Cheap Flights From Seattle - Tacoma Intl. (SEA) To O'Hare Intl. (ORD)

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Cheapest Flights from Seattle (SEA) to Chicago (ORD)

The cheapest flights to O'Hare Intl. found within the past 7 days were CA $159 round trip and CA $75 one way. Prices and availability subject to change. Additional terms may apply.

Wed., Oct. 1 - Sat., Oct. 4
SEA
Seattle
ORD
Chicago
CA $159 Roundtrip, found 4 days ago
CA $159
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed., Oct. 1 from Seattle to Chicago, returning Sat., Oct. 4, priced at CA $159 found 4 days ago
Wed., Oct. 1 - Sat., Oct. 4
SEA
Seattle
ORD
Chicago
CA $203 Roundtrip, found 4 days ago
CA $203
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed., Oct. 1 from Seattle to Chicago, returning Sat., Oct. 4, priced at CA $203 found 4 days ago
Mon., Jul. 14 - Tue., Aug. 12
SEA
Seattle
ORD
Chicago
CA $211 Roundtrip, found 5 days ago
CA $211
Roundtrip
found 5 days ago
Select Spirit Airlines flight, departing Mon., Jul. 14 from Seattle to Chicago, returning Tue., Aug. 12, priced at CA $211 found 5 days ago
Wed., Oct. 1 - Sat., Oct. 4
SEA
Seattle
ORD
Chicago
CA $241 Roundtrip, found 4 days ago
CA $241
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed., Oct. 1 from Seattle to Chicago, returning Sat., Oct. 4, priced at CA $241 found 4 days ago
Mon., Jul. 14 - Tue., Aug. 12
SEA
Seattle
ORD
Chicago
CA $244 Roundtrip, found 5 days ago
CA $244
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Mon., Jul. 14 from Seattle to Chicago, returning Tue., Aug. 12, priced at CA $244 found 5 days ago
Wed., Oct. 1 - Sat., Oct. 4
SEA
Seattle
ORD
Chicago
CA $248 Roundtrip, found 4 days ago
CA $248
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed., Oct. 1 from Seattle to Chicago, returning Sat., Oct. 4, priced at CA $248 found 4 days ago
Mon., Jul. 14 - Tue., Aug. 12
SEA
Seattle
ORD
Chicago
CA $249 Roundtrip, found 5 days ago
CA $249
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Mon., Jul. 14 from Seattle to Chicago, returning Tue., Aug. 12, priced at CA $249 found 5 days ago
Wed., Oct. 1 - Sat., Oct. 4
SEA
Seattle
ORD
Chicago
CA $251 Roundtrip, found 4 days ago
CA $251
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed., Oct. 1 from Seattle to Chicago, returning Sat., Oct. 4, priced at CA $251 found 4 days ago
Wed., Oct. 1 - Sat., Oct. 4
SEA
Seattle
ORD
Chicago
CA $252 Roundtrip, found 4 days ago
CA $252
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed., Oct. 1 from Seattle to Chicago, returning Sat., Oct. 4, priced at CA $252 found 4 days ago
Wed., Aug. 20 - Wed., Aug. 27
SEA
Seattle
ORD
Chicago
CA $257 Roundtrip, found 1 day ago
CA $257
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed., Aug. 20 from Seattle to Chicago, returning Wed., Aug. 27, priced at CA $257 found 1 day ago

Frequently asked questions

Are there direct flights from Seattle - Tacoma Intl. Airport (SEA) to O'Hare Airport?
Alaska Airlines and United Airlines are a couple of the airlines that sell nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to O'Hare Airport. If you're itching to get to where you're headed without swapping planes, these are your best options.
What airlines fly from SEA to O'Hare Intl. Airport (ORD)?
If you're heading from Seattle to Chicago, there is a good range of airlines that'll fly you there. Choose a seat with these popular air companies offering direct flights from Seattle - Tacoma Intl. Airport (SEA) to ORD:
  • Alaska Airlines - (AS) with 152 flights every month
  • United Airlines - (UA) with 152 flights every month
  • American Airlines - (AA) with 112 flights every month
  • Delta - (DL) with 78 flights every month

What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Seattle (SEA)

Travelers at SEA love to visit these top cities. Roam to the top destinations from Seattle (SEA) today with the cheap prices from Travelocity!

Popular Flight Routes from Chicago (ORD)

Travelers at ORD love to visit these top cities. Roam to the top destinations from Chicago(ORD) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.