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Cheap flights from Ottawa to Seattle from C$ 302

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.
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. - 12:26 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
11h 16m2 stops Vancouver Intl Calgary
C$ 585Air Canada
Sun, 22 Nov - Tue, 1 Dec
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
7:45 a.m. - 7:30 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
8h 45m1 stop Toronto Pearson Intl
C$ 596Air Canada
Sun, 22 Nov - Tue, 1 Dec
United Airlines Logo
6:15 a.m. - 4:18 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
13h 03m1 stop Chicago O'Hare Intl
United Airlines Logo
11:44 p.m. - 2:09 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
11h 25m1 stop Chicago O'Hare Intl
C$ 622United Airlines
Sat, 12 Dec - Mon, 4 Jan
United Airlines Logo
4:36 p.m. - 9:46 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
20h 10m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
7:25 p.m. - 1:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
14h 46m2 stops San Francisco Newark
C$ 622United Airlines
Sat, 12 Dec - Thu, 31 Dec
WestJet Logo
5:30 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
35h 10m2 stops Toronto Pearson Intl Calgary
WestJet Logo
2:30 p.m. - 2:30 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
21h 00m1 stop Calgary
C$ 677WestJet
Sat, 12 Dec - Sun, 3 Jan
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. - 11:40 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
30h 10m2 stops Calgary Toronto Pearson Intl
C$ 688WestJet
Thu, 10 Dec - Thu, 31 Dec
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$ 688Delta
Mon, 11 Jan - Mon, 18 Jan
Multiple Airlines Logo
6:10 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
Multiple Airlines Logo
6:00 a.m. - 7:17 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
10h 17m1 stop Newark
C$ 695Multiple Airlines
Wed, 9 Dec - Wed, 16 Dec
Delta Logo
5:30 a.m. - 2:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
12h 10m2 stops Toronto Pearson Intl Detroit Metropolitan Wayne County
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$ 706Delta
Mon, 11 Jan - Mon, 18 Jan
Multiple Airlines Logo
6:10 a.m. - 1:40 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
Multiple Airlines Logo
6:00 a.m. - 7:17 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
10h 17m1 stop Newark
C$ 710Multiple Airlines
Wed, 9 Dec - Wed, 16 Dec

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
12 Dec
YOW5:30 a.m.Ottawa
35h 10m
2 stops
SEA1:40 p.m.Seattle/Tacoma Intl
3 Jan
SEA2:30 p.m.Seattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 p.m.Ottawa
C$ 677
WestJet
3 Dec
YOW6:10 a.m.Ottawa
10h 30m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
9 Dec
SEA2:30 p.m.Seattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 p.m.Ottawa
C$ 680
WestJet
10 Dec
YOW6:10 a.m.Ottawa
10h 30m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
31 Dec
SEA2:30 p.m.Seattle/Tacoma Intl
30h 10m
2 stops
YOW11:40 p.m.Ottawa
C$ 688

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
12 Dec
YOW6:15 a.m.Ottawa
13h 03m
1 stop
SEA4:18 p.m.Seattle/Tacoma Intl
31 Dec
SEA7:00 a.m.Seattle/Tacoma Intl
11h 23m
1 stop
YOW9:23 p.m.Ottawa
C$ 622
United Airlines
10 Dec
YOW4:36 p.m.Ottawa
9h 07m
1 stop
SEA10:43 p.m.Seattle/Tacoma Intl
17 Dec
SEA5:34 p.m.Seattle/Tacoma Intl
24h 49m
2 stops
YOW9:23 p.m.Ottawa
C$ 716
United Airlines
12 Dec
YOW9:45 a.m.Ottawa
14h 36m
2 stops
SEA9:21 p.m.Seattle/Tacoma Intl
3 Jan
SEA7:10 p.m.Seattle/Tacoma Intl
23h 46m
2 stops
YOW9:56 p.m.Ottawa
C$ 750

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

Sun 22/11

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

2 stops13h 32m

Seattle/Tacoma Intl

Tue 1/12

10:10 a.m.-12:26 a.m.

2 stops11h 16m

C$ 585

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 22/11

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

2 stops13h 32m

Seattle/Tacoma Intl

Tue 1/12

7:45 a.m.-7:30 p.m.

1 stop8h 45m

C$ 596

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/12

6:15 a.m.-4:18 p.m.

1 stop13h 03m

Seattle/Tacoma Intl

Mon 4/1

11:44 p.m.-2:09 p.m.

1 stop11h 25m

C$ 622

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/12

4:36 p.m.-9:46 a.m.

2 stops20h 10m

Seattle/Tacoma Intl

Thu 31/12

7:25 p.m.-1:11 p.m.

2 stops14h 46m

C$ 622

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/12

5:30 a.m.-1:40 p.m.

2 stops35h 10m

Seattle/Tacoma Intl

Sun 3/1

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

1 stop21h 00m

C$ 677

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 10/12

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

1 stop10h 30m

Seattle/Tacoma Intl

Thu 31/12

2:30 p.m.-11:40 p.m.

2 stops30h 10m

C$ 688

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 11/1

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

1 stop10h 30m

Seattle/Tacoma Intl

Mon 18/1

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

2 stops14h 40m

C$ 688
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 9/12

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

1 stop10h 30m

Seattle/Tacoma Intl

Wed 16/12

6:00 a.m.-7:17 p.m.

1 stop10h 17m

C$ 695

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 11/1

5:30 a.m.-2:40 p.m.

2 stops12h 10m

Seattle/Tacoma Intl

Mon 18/1

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

2 stops14h 40m

C$ 706

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 9/12

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

1 stop10h 30m

Seattle/Tacoma Intl

Wed 16/12

6:00 a.m.-7:17 p.m.

1 stop10h 17m

C$ 710

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$ 625 to C$ 877.
The lowest price recently found on this route was C$ 585.

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$ 473.

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$ 641 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$ 432 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 14% 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$ 302

Fastest flight time

9h 31m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is C$ 302. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is C$ 585.
The fastest flight from Ottawa to Seattle takes 9h 31m
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. 9h 31m 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$ 253Free CancellationRating
7.1
11,833 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 255Free CancellationRating
7.3
10,451 reviews
Search United Airlines flights
WestJetPriceFrom C$ 308Free CancellationRating
7.2
3,442 reviews
Search WestJet flights
DeltaPriceFrom C$ 397Free CancellationRating
7.8
8,692 reviews
Search Delta flights

Travelling to a place near Seattle?

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

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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