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

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

The cheapest flights to Seattle - Tacoma 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.

Thu., Oct. 23 - Wed., Oct. 29
ORD
Chicago
SEA
Seattle
CA $159 Roundtrip, found 4 days ago
CA $159
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu., Oct. 23 from Chicago to Seattle, returning Wed., Oct. 29, priced at CA $159 found 4 days ago
Thu., Nov. 6 - Wed., Nov. 12
ORD
Chicago
SEA
Seattle
CA $206 Roundtrip, found 5 days ago
CA $206
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu., Nov. 6 from Chicago to Seattle, returning Wed., Nov. 12, priced at CA $206 found 5 days ago
Thu., Oct. 23 - Wed., Oct. 29
ORD
Chicago
SEA
Seattle
CA $207 Roundtrip, found 4 days ago
CA $207
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu., Oct. 23 from Chicago to Seattle, returning Wed., Oct. 29, priced at CA $207 found 4 days ago
Thu., Oct. 23 - Wed., Oct. 29
ORD
Chicago
SEA
Seattle
CA $209 Roundtrip, found 4 days ago
CA $209
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu., Oct. 23 from Chicago to Seattle, returning Wed., Oct. 29, priced at CA $209 found 4 days ago
Thu., Oct. 23 - Wed., Oct. 29
ORD
Chicago
SEA
Seattle
CA $220 Roundtrip, found 4 days ago
CA $220
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu., Oct. 23 from Chicago to Seattle, returning Wed., Oct. 29, priced at CA $220 found 4 days ago
Thu., Nov. 6 - Wed., Nov. 12
ORD
Chicago
SEA
Seattle
CA $222 Roundtrip, found 5 days ago
CA $222
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu., Nov. 6 from Chicago to Seattle, returning Wed., Nov. 12, priced at CA $222 found 5 days ago
Thu., Oct. 23 - Wed., Oct. 29
ORD
Chicago
SEA
Seattle
CA $241 Roundtrip, found 4 days ago
CA $241
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu., Oct. 23 from Chicago to Seattle, returning Wed., Oct. 29, priced at CA $241 found 4 days ago
Thu., Oct. 23 - Wed., Oct. 29
ORD
Chicago
SEA
Seattle
CA $248 Roundtrip, found 4 days ago
CA $248
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu., Oct. 23 from Chicago to Seattle, returning Wed., Oct. 29, priced at CA $248 found 4 days ago
Sun., Aug. 31 - Sat., Sep. 6
ORD
Chicago
SEA
Seattle
CA $251 Roundtrip, found 4 days ago
CA $251
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sun., Aug. 31 from Chicago to Seattle, returning Sat., Sep. 6, priced at CA $251 found 4 days ago
Thu., Oct. 23 - Wed., Oct. 29
ORD
Chicago
SEA
Seattle
CA $252 Roundtrip, found 4 days ago
CA $252
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu., Oct. 23 from Chicago to Seattle, returning Wed., Oct. 29, priced at CA $252 found 4 days ago

Frequently asked questions

Are there direct flights from O'Hare Airport to SEA?
If you'd love to venture from O'Hare Airport to Sea-Tac Airport as fast as possible, you'll be happy to know multiple airlines operate direct flights. Select your preferred seat with Alaska Airlines or United Airlines.
What airlines fly from O'Hare Airport to Sea-Tac Airport?
If you're eager to fly direct from O'Hare Airport to SEA, you won't have a problem finding a fare. Here are the best airlines that advertise nonstop services on this route:
  • Alaska Airlines - (AS) with 152 flights every month
  • United Airlines - (UA) with 152 flights every month
  • American Airlines - (AA) with 108 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.
*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.