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Cheap flights from Ottawa to Seattle from C$ 314

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
6:10 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
WestJet Logo
2:30 p.m. - 2:30 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
21h 00m1 stop Calgary
C$ 505WestJet
Wed, 27 Jan - Mon, 15 Feb
WestJet Logo
6:10 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
WestJet Logo
2:30 p.m. - 2:30 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
21h 00m1 stop Calgary
C$ 509WestJet
Sun, 22 Nov - Tue, 1 Dec
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. - 12:56 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
13h 16m1 stop Vancouver Intl
C$ 602Air Canada
Thu, 12 Nov - Sun, 22 Nov
Air Canada Logo
2:00 p.m. - 8:59 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
9h 59m1 stop Toronto Pearson Intl
Air Canada Logo
7:45 a.m. - 7:45 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
9h 00m1 stop Toronto Pearson Intl
C$ 609Air Canada
Sat, 31 Oct - Tue, 10 Nov
United Airlines Logo
6:15 a.m. - 8:47 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
17h 32m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
7:04 p.m. - 1:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
15h 07m2 stops Denver Intl Newark
C$ 665United Airlines
Fri, 13 Nov - Sun, 22 Nov
United Airlines Logo
4:46 p.m. - 9:40 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
19h 54m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
7:04 p.m. - 2:09 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
16h 05m2 stops Denver Intl Chicago O'Hare Intl
C$ 665United Airlines
Fri, 13 Nov - Sun, 22 Nov
Delta Logo
6:10 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
Delta Logo
6:00 a.m. - 11:40 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
14h 40m2 stops Detroit Metropolitan Wayne County Toronto Pearson Intl
C$ 669Delta
Sun, 13 Dec - Tue, 5 Jan
Delta Logo
6:10 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
Delta Logo
6:00 a.m. - 11:40 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
14h 40m2 stops Detroit Metropolitan Wayne County Toronto Pearson Intl
C$ 669Delta
Mon, 14 Dec - Tue, 5 Jan
Multiple Airlines Logo
2:00 p.m. - 8:56 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
9h 56m1 stop Washington, D.C. Dulles Intl
Multiple Airlines Logo
10:10 a.m. - 11:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
10h 01m2 stops Vancouver Intl Calgary
C$ 674Multiple Airlines
Sat, 31 Oct - Tue, 10 Nov
Multiple Airlines Logo
6:15 a.m. - 9:19 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
18h 04m2 stops Chicago O'Hare Intl Denver Intl
Multiple Airlines Logo
7:05 p.m. - 11:37 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
13h 32m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl
C$ 679Multiple Airlines
Thu, 12 Nov - Mon, 16 Nov

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
27 Jan
YOW6:10 a.m.Ottawa
10h 30m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
15 Feb
SEA2:30 p.m.Seattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 p.m.Ottawa
C$ 505
WestJet
22 Nov
YOW6:10 a.m.Ottawa
10h 30m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
1 Dec
SEA2:30 p.m.Seattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 p.m.Ottawa
C$ 509
WestJet
19 Nov
YOW6:10 a.m.Ottawa
10h 30m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
26 Nov
SEA2:30 p.m.Seattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 p.m.Ottawa
C$ 526

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
3 Dec
YOW7:45 a.m.Ottawa
9h 52m
1 stop
SEA2:37 p.m.Seattle/Tacoma Intl
8 Dec
SEA7:45 a.m.Seattle/Tacoma Intl
8h 00m
1 stop
YOW6:45 p.m.Ottawa
C$ 581
Air Canada
31 Oct
YOW2:00 p.m.Ottawa
9h 59m
1 stop
SEA8:59 p.m.Seattle/Tacoma Intl
10 Nov
SEA7:45 a.m.Seattle/Tacoma Intl
9h 00m
1 stop
YOW7:45 p.m.Ottawa
C$ 592
Air Canada
12 Nov
YOW7:45 a.m.Ottawa
9h 52m
1 stop
SEA2:37 p.m.Seattle/Tacoma Intl
22 Nov
SEA8:40 a.m.Seattle/Tacoma Intl
13h 16m
1 stop
YOW12:56 a.m.Ottawa
C$ 602

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

Wed 27/1

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

1 stop10h 30m

Seattle/Tacoma Intl

Mon 15/2

2:30 p.m.-2:30 p.m.

1 stop21h 00m

C$ 505

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 22/11

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

1 stop10h 30m

Seattle/Tacoma Intl

Tue 1/12

2:30 p.m.-2:30 p.m.

1 stop21h 00m

C$ 509

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 12/11

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

1 stop9h 52m

Seattle/Tacoma Intl

Sun 22/11

8:40 a.m.-12:56 a.m.

1 stop13h 16m

C$ 602
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 31/10

2:00 p.m.-8:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Tue 10/11

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

1 stop9h 00m

C$ 609

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 13/11

6:15 a.m.-8:47 p.m.

2 stops17h 32m

Seattle/Tacoma Intl

Sun 22/11

7:04 p.m.-1:11 p.m.

2 stops15h 07m

C$ 664

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 13/11

4:46 p.m.-9:40 a.m.

2 stops19h 54m

Seattle/Tacoma Intl

Sun 22/11

7:04 p.m.-2:09 p.m.

2 stops16h 05m

C$ 664

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 13/12

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

1 stop10h 30m

Seattle/Tacoma Intl

Tue 5/1

6:00 a.m.-11:40 p.m.

2 stops14h 40m

C$ 669

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 14/12

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

1 stop10h 30m

Seattle/Tacoma Intl

Tue 5/1

6:00 a.m.-11:40 p.m.

2 stops14h 40m

C$ 669

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 31/10

2:00 p.m.-8:56 p.m.

1 stop9h 56m

Seattle/Tacoma Intl

Tue 10/11

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

2 stops10h 01m

C$ 674

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 12/11

6:15 a.m.-9:19 p.m.

2 stops18h 04m

Seattle/Tacoma Intl

Mon 16/11

7:05 p.m.-11:37 a.m.

2 stops13h 32m

C$ 679

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 typical for flights on this route.

Typical prices usually range from C$ 411 to C$ 656.
The lowest price recently found on this route was C$ 505.

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 October is also cheap. Prices for this month can be found on momondo for an average of C$ 474.

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$ 629 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$ 440 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 October 2026, prices for Ottawa to Seattle flights are approximately 12% 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

Best price found

C$ 314

Fastest flight time

10h 30m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is C$ 314. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is C$ 505.
The fastest flight from Ottawa to Seattle takes 10h 30m
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. 10h 30m 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$ 257Free CancellationRating
7.1
11,775 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 259Free CancellationRating
7.4
10,366 reviews
Search United Airlines flights
WestJetPriceFrom C$ 313Free CancellationRating
7.2
3,446 reviews
Search WestJet flights
DeltaPriceFrom C$ 404Free CancellationRating
7.8
8,651 reviews
Search Delta flights

Travelling to a place near Seattle?

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

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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