Cheap Flights From Macdonald-Cartier Intl. (YOW) To Seattle - Tacoma Intl. (SEA)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly

Cheapest Flights from Ottawa (YOW) to Seattle (SEA)

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $449 round trip and CA $258 one way. Prices and availability subject to change. Additional terms may apply.

Mon, Sep. 8 - Mon, Sep. 15
YOW
Ottawa
SEA
Seattle
CA $449 Roundtrip, found 3 days ago
CA $449
Roundtrip
found 3 days ago
Select WestJet flight, departing Mon, Sep. 8 from Ottawa to Seattle, returning Mon, Sep. 15, priced at CA $449 found 3 days ago
Fri, Aug. 29 - Wed, Sep. 10
YOW
Ottawa
SEA
Seattle
CA $482 Roundtrip, found 3 days ago
CA $482
Roundtrip
found 3 days ago
Select WestJet flight, departing Fri, Aug. 29 from Ottawa to Seattle, returning Wed, Sep. 10, priced at CA $482 found 3 days ago
Thu, Aug. 28 - Wed, Sep. 3
YOW
Ottawa
SEA
Seattle
CA $482 Roundtrip, found 1 day ago
CA $482
Roundtrip
found 1 day ago
Select WestJet flight, departing Thu, Aug. 28 from Ottawa to Seattle, returning Wed, Sep. 3, priced at CA $482 found 1 day ago
Fri, Oct. 10 - Sun, Oct. 19
YOW
Ottawa
SEA
Seattle
CA $503 Roundtrip, found 3 days ago
CA $503
Roundtrip
found 3 days ago
Select WestJet flight, departing Fri, Oct. 10 from Ottawa to Seattle, returning Sun, Oct. 19, priced at CA $503 found 3 days ago
Wed, Sep. 24 - Wed, Oct. 1
YOW
Ottawa
SEA
Seattle
CA $503 Roundtrip, found 2 days ago
CA $503
Roundtrip
found 2 days ago
Select WestJet flight, departing Wed, Sep. 24 from Ottawa to Seattle, returning Wed, Oct. 1, priced at CA $503 found 2 days ago
Fri, Sep. 5 - Mon, Sep. 8
YOW
Ottawa
SEA
Seattle
CA $509 Roundtrip, found 3 hours ago
CA $509
Roundtrip
found 3 hours ago
Select WestJet flight, departing Fri, Sep. 5 from Ottawa to Seattle, returning Mon, Sep. 8, priced at CA $509 found 3 hours ago
Fri, Sep. 5 - Mon, Sep. 8
YOW
Ottawa
SEA
Seattle
CA $513 Roundtrip, found 3 hours ago
CA $513
Roundtrip
found 3 hours ago
Select WestJet flight, departing Fri, Sep. 5 from Ottawa to Seattle, returning Mon, Sep. 8, priced at CA $513 found 3 hours ago
Mon, Aug. 18 - Mon, Aug. 25
YOW
Ottawa
SEA
Seattle
CA $514 Roundtrip, found 3 days ago
CA $514
Roundtrip
found 3 days ago
Select WestJet flight, departing Mon, Aug. 18 from Ottawa to Seattle, returning Mon, Aug. 25, priced at CA $514 found 3 days ago
Fri, Aug. 22 - Wed, Aug. 27
YOW
Ottawa
SEA
Seattle
CA $535 Roundtrip, found 4 days ago
CA $535
Roundtrip
found 4 days ago
Select WestJet flight, departing Fri, Aug. 22 from Ottawa to Seattle, returning Wed, Aug. 27, priced at CA $535 found 4 days ago
Wed, Aug. 20 - Wed, Sep. 3
YOW
Ottawa
SEA
Seattle
CA $536 Roundtrip, found 4 hours ago
CA $536
Roundtrip
found 4 hours ago
Select WestJet flight, departing Wed, Aug. 20 from Ottawa to Seattle, returning Wed, Sep. 3, priced at CA $536 found 4 hours ago

Frequently asked questions

Are there direct flights from YOW to SEA?
Air Canada, WestJet and Air New Zealand will fly you to Seattle from Ottawa with one stopover. Unfortunately, there are no direct flights between Ottawa International Airport and Sea-Tac Airport just yet.
What airlines fly from YOW to Sea-Tac Airport?
Currently, no airlines offer a direct flight between Ottawa International Airport and Seattle - Tacoma Intl. Airport (SEA). Save time and avoid annoying stopovers by investigating the most efficient routes well in advance.
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.