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Cheap flights from Ottawa to Seattle from C$ 307

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Seattle departing on 12/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ottawa to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
5:40 a.m. - 2:19 p.m.YOW-SEA
11h 39m2 stops
WestJet Logo
3:10 p.m. - 4:53 p.m.SEA-YOW
22h 43m1 stop
C$ 403WestJet
Find Deal
Tue, 14 Apr - Wed, 15 Apr
Air Canada Logo
5:50 p.m. - 10:08 p.m.YOW-SEA
7h 18m1 stop
Air Canada Logo
8:00 p.m. - 6:43 a.m.SEA-YOW
7h 43m1 stop
C$ 428Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
Air Canada Logo
5:50 p.m. - 10:08 p.m.YOW-SEA
7h 18m1 stop
Air Canada Logo
5:50 a.m. - 3:45 p.m.SEA-YOW
6h 55m1 stop
C$ 429Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
United Airlines Logo
6:00 a.m. - 10:18 p.m.YOW-SEA
19h 18m2 stops
United Airlines Logo
11:50 p.m. - 1:45 p.m.SEA-YOW
10h 55m1 stop
C$ 435United Airlines
Find Deal
Tue, 14 Apr - Wed, 15 Apr
Air Canada Logo
5:50 p.m. - 10:08 p.m.YOW-SEA
7h 18m1 stop
Air Canada Logo
10:10 a.m. - 1:34 a.m.SEA-YOW
12h 24m2 stops
C$ 439Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
Air Canada Logo
5:45 a.m. - 7:18 p.m.YOW-SEA
16h 33m2 stops
Air Canada Logo
10:10 a.m. - 1:34 a.m.SEA-YOW
12h 24m2 stops
C$ 480Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
United Airlines Logo
2:17 p.m. - 12:50 a.m.YOW-SEA
13h 33m2 stops
United Airlines Logo
11:59 p.m. - 5:18 p.m.SEA-YOW
14h 19m2 stops
C$ 748United Airlines
Find Deal
Mon, 15 Dec - Wed, 31 Dec
WestJet Logo
5:45 p.m. - 2:20 p.m.YOW-SEA
23h 35m1 stop
WestJet Logo
3:10 p.m. - 6:21 p.m.SEA-YOW
24h 11m2 stops
C$ 812WestJet
Find Deal
Sun, 16 Nov - Thu, 4 Dec
American Airlines Logo
6:45 a.m. - 6:49 p.m.YOW-SEA
15h 04m2 stops
American Airlines Logo
12:14 a.m. - 4:51 p.m.SEA-YOW
13h 37m2 stops
C$ 832American Airlines
Find Deal
Mon, 15 Dec - Tue, 30 Dec
American Airlines Logo
9:10 a.m. - 10:04 p.m.YOW-SEA
15h 54m2 stops
American Airlines Logo
12:14 a.m. - 4:51 p.m.SEA-YOW
13h 37m2 stops
C$ 976American Airlines
Find Deal
Tue, 30 Dec - Sat, 3 Jan

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
14 Apr
YOW5:40 a.m.Ottawa
11h 39m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
15 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 p.m.Ottawa
C$ 403
Find similar
WestJet
16 Nov
YOW5:45 p.m.Ottawa
23h 35m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
4 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
24h 11m
2 stops
YOW6:21 p.m.Ottawa
C$ 812
Find similar
WestJet
16 Nov
YOW5:40 a.m.Ottawa
35h 40m
2 stops
SEA2:20 p.m.Seattle/Tacoma Intl
4 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
24h 11m
2 stops
YOW6:21 p.m.Ottawa
C$ 843
Find similar

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
14 Apr
YOW5:50 p.m.Ottawa
7h 18m
1 stop
SEA10:08 p.m.Seattle/Tacoma Intl
15 Apr
SEA8:00 p.m.Seattle/Tacoma Intl
7h 43m
1 stop
YOW6:43 a.m.Ottawa
C$ 428
Find similar
Air Canada
14 Apr
YOW5:50 p.m.Ottawa
7h 18m
1 stop
SEA10:08 p.m.Seattle/Tacoma Intl
15 Apr
SEA5:50 a.m.Seattle/Tacoma Intl
6h 55m
1 stop
YOW3:45 p.m.Ottawa
C$ 429
Find similar
Air Canada
14 Apr
YOW5:50 p.m.Ottawa
7h 18m
1 stop
SEA10:08 p.m.Seattle/Tacoma Intl
15 Apr
SEA10:10 a.m.Seattle/Tacoma Intl
12h 24m
2 stops
YOW1:34 a.m.Ottawa
C$ 439
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa 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, momondo users made 96,600 searches. Data last updated 5 November 2025.
Use the filters below to find and compare flights from Ottawa to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:40 a.m.-2:19 p.m.

2 stops11h 39m

Seattle/Tacoma Intl

Wed 15/4

3:10 p.m.-4:53 p.m.

1 stop22h 43m

C$ 403

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:50 p.m.-10:08 p.m.

1 stop7h 18m

Seattle/Tacoma Intl

Wed 15/4

8:00 p.m.-6:43 a.m.

1 stop7h 43m

C$ 428

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:50 p.m.-10:08 p.m.

1 stop7h 18m

Seattle/Tacoma Intl

Wed 15/4

5:50 a.m.-3:45 p.m.

1 stop6h 55m

C$ 429

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

6:00 a.m.-10:18 p.m.

2 stops19h 18m

Seattle/Tacoma Intl

Wed 15/4

11:50 p.m.-1:45 p.m.

1 stop10h 55m

C$ 435

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:50 p.m.-10:08 p.m.

1 stop7h 18m

Seattle/Tacoma Intl

Wed 15/4

10:10 a.m.-1:34 a.m.

2 stops12h 24m

C$ 439

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

5:45 a.m.-7:18 p.m.

2 stops16h 33m

Seattle/Tacoma Intl

Wed 15/4

10:10 a.m.-1:34 a.m.

2 stops12h 24m

C$ 480

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 15/12

2:17 p.m.-12:50 a.m.

2 stops13h 33m

Seattle/Tacoma Intl

Wed 31/12

11:59 p.m.-5:18 p.m.

2 stops14h 19m

C$ 748

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 16/11

5:45 p.m.-2:20 p.m.

1 stop23h 35m

Seattle/Tacoma Intl

Thu 4/12

3:10 p.m.-6:21 p.m.

2 stops24h 11m

C$ 812

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 15/12

6:45 a.m.-6:49 p.m.

2 stops15h 04m

Seattle/Tacoma Intl

Tue 30/12

12:14 a.m.-4:51 p.m.

2 stops13h 37m

C$ 832

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 30/12

9:10 a.m.-10:04 p.m.

2 stops15h 54m

Seattle/Tacoma Intl

Sat 3/1

12:14 a.m.-4:51 p.m.

2 stops13h 37m

C$ 976

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Ottawa to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 541.

What is the cheapest day to depart on your flight to Seattle?

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 602. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around C$ 684. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Ottawa to Seattle during this time can be as low as C$ 604. Flights at noon are often more expensive with an average ticket price of C$ 704.

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 594 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ottawa for as low as C$ 435 on momondo.

How have Ottawa to Seattle flight prices changed over time?

As of November 2025, prices for Ottawa to Seattle flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from Ottawa to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ottawa to Seattle (YOW to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Seattle

Direct flights

None
There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.
Search flight deals

  • How far is Ottawa to Seattle/Tacoma Intl by plane?

    The distance between Ottawa and Seattle/Tacoma Intl is about 3521.0 km. 7h 18m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Ottawa Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Ottawa Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ottawa Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Ottawa Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ottawa to Seattle?

Best airlines flying from Ottawa to Seattle

Compare and see reviews for airlines that fly from Ottawa to Seattle with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 371Free CancellationRating
7.2
3,153 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 414Free CancellationRating
7.1
10,409 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 428Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
Marysville
Tacoma
SeaTac
Kirkland
Olympia
Ocean Shores
Redmond
Ellensburg
Gig Harbor
Renton
Mukilteo
Cle Elum
Centralia
Federal Way
Shelton
Puyallup
Lakewood
Kent

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Ottawa.

Can I find flights from Ottawa to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from Ottawa with this policy.

How can momondo help me find flights from Ottawa to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Ottawa. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ottawa to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ottawa to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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