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Cheap flights from Ottawa to Seattle from C$ 229

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ottawa to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 347WestJet
Tue, 13 Oct - Tue, 20 Oct
WestJet Logo
8:15 p.m. - 9:40 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
16h 25m1 stop Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 374WestJet
Fri, 16 Oct - Fri, 23 Oct
WestJet Logo
6:15 p.m. - 9:40 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
18h 25m2 stops Edmonton Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 390WestJet
Fri, 16 Oct - Fri, 23 Oct
Multiple Airlines Logo
6:10 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
Multiple Airlines Logo
5:48 p.m. - 12:01 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
27h 13m1 stop Calgary
C$ 446Multiple Airlines
Fri, 20 Nov - Mon, 30 Nov
Multiple Airlines Logo
5:00 a.m. - 10:05 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 05m1 stop Vancouver Intl
Multiple Airlines Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 459Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Air Canada Logo
7:45 a.m. - 2:37 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
9h 52m1 stop Vancouver Intl
Air Canada Logo
8:40 a.m. - 11:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
11h 31m2 stops Vancouver Intl Calgary
C$ 513Air Canada
Wed, 28 Oct - Wed, 4 Nov
Air Canada Logo
7:50 a.m. - 6:22 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
13h 32m2 stops Calgary Vancouver Intl
Air Canada Logo
10:10 a.m. - 11:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
10h 01m2 stops Vancouver Intl Calgary
C$ 519Air Canada
Wed, 28 Oct - Wed, 4 Nov
United Airlines Logo
6:25 a.m. - 8:37 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
17h 12m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl
United Airlines Logo
6:05 p.m. - 9:56 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
12h 51m2 stops Denver Intl Washington, D.C. Dulles Intl
C$ 554United Airlines
Wed, 14 Oct - Fri, 16 Oct
United Airlines Logo
6:00 a.m. - 6:52 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
15h 52m3 stops Washington, D.C. Dulles Intl Indianapolis Chicago O'Hare Intl
United Airlines Logo
6:05 p.m. - 9:56 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
12h 51m2 stops Denver Intl Washington, D.C. Dulles Intl
C$ 554United Airlines
Wed, 14 Oct - Fri, 16 Oct
Delta Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Delta Logo
6:00 a.m. - 5:35 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
8h 35m2 stops Detroit Metropolitan Wayne County Toronto Pearson Intl
C$ 563Delta
Wed, 30 Sep - Sun, 4 Oct

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United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
14 Oct
YOW6:00 a.m.Ottawa
15h 52m
3 stops
SEA6:52 p.m.Seattle/Tacoma Intl
16 Oct
SEA6:05 p.m.Seattle/Tacoma Intl
12h 51m
2 stops
YOW9:56 a.m.Ottawa
C$ 554
United Airlines
14 Oct
YOW6:00 a.m.Ottawa
15h 52m
3 stops
SEA6:52 p.m.Seattle/Tacoma Intl
16 Oct
SEA6:05 p.m.Seattle/Tacoma Intl
12h 51m
2 stops
YOW9:56 a.m.Ottawa
C$ 555
United Airlines
30 Sep
YOW5:20 p.m.Ottawa
8h 36m
1 stop
SEA10:56 p.m.Seattle/Tacoma Intl
4 Oct
SEA5:07 p.m.Seattle/Tacoma Intl
17h 52m
1 stop
YOW1:59 p.m.Ottawa
C$ 561

American Airlines flights from Ottawa to Seattle

Our best American Airlines deals on Ottawa to Seattle flight tickets
American Airlines
30 Sep
YOW7:00 a.m.Ottawa
16h 07m
3 stops
SEA8:07 p.m.Seattle/Tacoma Intl
4 Oct
SEA10:45 p.m.Seattle/Tacoma Intl
13h 10m
2 stops
YOW2:55 p.m.Ottawa
C$ 1,655
American Airlines
30 Sep
YOW7:00 a.m.Ottawa
16h 07m
2 stops
SEA8:07 p.m.Seattle/Tacoma Intl
4 Oct
SEA11:45 p.m.Seattle/Tacoma Intl
17h 20m
3 stops
YOW8:05 p.m.Ottawa
C$ 1,708
American Airlines
30 Sep
YOW7:00 a.m.Ottawa
16h 07m
3 stops
SEA8:07 p.m.Seattle/Tacoma Intl
4 Oct
SEA11:57 p.m.Seattle/Tacoma Intl
17h 08m
3 stops
YOW8:05 p.m.Ottawa
C$ 1,844

momondo Fare Finder

 
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

Cheapest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 13/10

1:20 p.m.-6:45 p.m.

1 stop8h 25m

Seattle/Tacoma Intl

Tue 20/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

C$ 347

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 16/10

8:15 p.m.-9:40 a.m.

1 stop16h 25m

Seattle/Tacoma Intl

Fri 23/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

C$ 374

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 16/10

6:15 p.m.-9:40 a.m.

2 stops18h 25m

Seattle/Tacoma Intl

Fri 23/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

C$ 390

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 20/11

6:10 a.m.-1:40 p.m.

1 stop10h 30m

Seattle/Tacoma Intl

Mon 30/11

5:48 p.m.-12:01 a.m.

1 stop27h 13m

C$ 446
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 12/10

5:00 a.m.-10:05 a.m.

1 stop8h 05m

Seattle/Tacoma Intl

Mon 19/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

C$ 459

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 28/10

7:45 a.m.-2:37 p.m.

1 stop9h 52m

Seattle/Tacoma Intl

Wed 4/11

8:40 a.m.-11:11 p.m.

2 stops11h 31m

C$ 513

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 28/10

7:50 a.m.-6:22 p.m.

2 stops13h 32m

Seattle/Tacoma Intl

Wed 4/11

10:10 a.m.-11:11 p.m.

2 stops10h 01m

C$ 519

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 14/10

6:25 a.m.-8:37 p.m.

2 stops17h 12m

Seattle/Tacoma Intl

Fri 16/10

6:05 p.m.-9:56 a.m.

2 stops12h 51m

C$ 554

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 14/10

6:00 a.m.-6:52 p.m.

3 stops15h 52m

Seattle/Tacoma Intl

Fri 16/10

6:05 p.m.-9:56 a.m.

2 stops12h 51m

C$ 554

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 30/9

1:20 p.m.-6:45 p.m.

1 stop8h 25m

Seattle/Tacoma Intl

Sun 4/10

6:00 a.m.-5:35 p.m.

2 stops8h 35m

C$ 563

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 typical price of a round-trip flight between Ottawa and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from C$ 442 to C$ 597.
The lowest price recently found on this route was C$ 347.

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of C$ 471.

How far in advance should I book a flight from Ottawa 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$ 623 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$ 431 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 12% on your flight if you consider stops on a Ottawa to Seattle flight.

How have Ottawa to Seattle flight prices changed over time?

As of September 2026, prices for Ottawa to Seattle flights are approximately 14% cheaper 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

Best price found

C$ 229

Fastest flight time

8h 36m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is C$ 229. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is C$ 347.
The fastest flight from Ottawa to Seattle takes 8h 36m
There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.
Search flight deals

Frequently asked questions about flying from Ottawa to Seattle

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

    The distance between Ottawa and Seattle/Tacoma Intl is about 3521.0 km. 8h 36m 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
Air CanadaPriceFrom C$ 252Free CancellationRating
7.1
11,640 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 254Free CancellationRating
7.4
10,214 reviews
Search United Airlines flights
WestJetPriceFrom C$ 328Free CancellationRating
7.2
3,446 reviews
Search WestJet flights
DeltaPriceFrom C$ 396Free CancellationRating
7.8
8,579 reviews
Search Delta flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
SeaTac
Kirkland
Redmond
Tacoma
Marysville
Tukwila
Olympia
Woodinville
Puyallup
Bainbridge Island
Ellensburg
Edmonds
Chehalis
Fife
Renton
Shoreline
Ocean Shores
Lakewood

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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