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Cheap flights from Ottawa to Seattle from C$ 238

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
12:25 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
9h 20m2 stops Winnipeg Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 304WestJet
Sat, 12 Sep - Wed, 16 Sep
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$ 310WestJet
Sat, 12 Sep - Wed, 16 Sep
United Airlines Logo
6:00 a.m. - 10:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
19h 45m3 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$ 595United Airlines
Wed, 23 Sep - Wed, 30 Sep
Multiple Airlines Logo
2:00 p.m. - 9:40 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
22h 40m2 stops Hamilton Calgary
Multiple Airlines Logo
7:35 p.m. - 12:55 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
14h 20m1 stop Calgary
C$ 601Multiple Airlines
Fri, 25 Sep - Mon, 28 Sep
Multiple Airlines Logo
2:00 p.m. - 9:40 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
22h 40m2 stops Hamilton Calgary
Multiple Airlines Logo
7:35 p.m. - 12:30 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
13h 55m2 stops Calgary Edmonton
C$ 606Multiple Airlines
Fri, 25 Sep - Mon, 28 Sep
United Airlines Logo
6:00 a.m. - 9:12 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
18h 12m2 stops Newark Denver Intl
United Airlines Logo
3:51 p.m. - 3:10 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
20h 19m2 stops Denver Intl Washington, D.C. Dulles Intl
C$ 679United Airlines
Fri, 22 Jan - Fri, 29 Jan
Delta Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Delta Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 1,386Delta
Wed, 30 Sep - Sun, 18 Oct
Delta Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Delta Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 1,386Delta
Fri, 2 Oct - Wed, 14 Oct
Air Canada Logo
5:00 a.m. - 10:05 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 05m1 stop Vancouver Intl
Air Canada Logo
7:15 p.m. - 5:00 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
18h 45m2 stops Vancouver Intl Winnipeg
C$ 1,904Air Canada
Sun, 4 Oct - Tue, 20 Oct
Air Canada Logo
5:00 a.m. - 10:05 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 05m1 stop Vancouver Intl
Air Canada Logo
7:15 p.m. - 5:58 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 43m1 stop Vancouver Intl
C$ 1,949Air Canada
Sat, 3 Oct - Sat, 17 Oct

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
12 Sep
YOW12:25 p.m.Ottawa
9h 20m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
16 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 304
WestJet
12 Sep
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
16 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 310
WestJet
12 Sep
YOW12:25 p.m.Ottawa
9h 20m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
16 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
13h 55m
2 stops
YOW12:30 p.m.Ottawa
C$ 355

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
28 Aug
YOW6:25 a.m.Ottawa
8h 07m
1 stop
SEA11:32 a.m.Seattle/Tacoma Intl
4 Sep
SEA11:04 p.m.Seattle/Tacoma Intl
16h 51m
1 stop
YOW6:55 p.m.Ottawa
C$ 1,188
United Airlines
26 Aug
YOW5:57 p.m.Ottawa
8h 47m
1 stop
SEA11:44 p.m.Seattle/Tacoma Intl
2 Sep
SEA7:00 a.m.Seattle/Tacoma Intl
7h 16m
1 stop
YOW5:16 p.m.Ottawa
C$ 1,396

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

Sat 12/9

12:25 p.m.-6:45 p.m.

2 stops9h 20m

Seattle/Tacoma Intl

Wed 16/9

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

1 stop7h 00m

C$ 304
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Wed 16/9

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

1 stop7h 00m

C$ 310

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 23/9

6:00 a.m.-10:45 p.m.

3 stops19h 45m

Seattle/Tacoma Intl

Wed 30/9

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

2 stops12h 51m

C$ 595

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 25/9

2:00 p.m.-9:40 a.m.

2 stops22h 40m

Seattle/Tacoma Intl

Mon 28/9

7:35 p.m.-12:55 p.m.

1 stop14h 20m

C$ 601

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 25/9

2:00 p.m.-9:40 a.m.

2 stops22h 40m

Seattle/Tacoma Intl

Mon 28/9

7:35 p.m.-12:30 p.m.

2 stops13h 55m

C$ 606

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 22/1

6:00 a.m.-9:12 p.m.

2 stops18h 12m

Seattle/Tacoma Intl

Fri 29/1

3:51 p.m.-3:10 p.m.

2 stops20h 19m

C$ 679

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 18/10

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

1 stop7h 00m

C$ 1,386

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 2/10

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

1 stop8h 25m

Seattle/Tacoma Intl

Wed 14/10

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

1 stop7h 00m

C$ 1,386

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 4/10

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

1 stop8h 05m

Seattle/Tacoma Intl

Tue 20/10

7:15 p.m.-5:00 p.m.

2 stops18h 45m

C$ 1,904

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 3/10

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

1 stop8h 05m

Seattle/Tacoma Intl

Sat 17/10

7:15 p.m.-5:58 a.m.

1 stop7h 43m

C$ 1,949

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$ 480 to C$ 714.
The lowest price recently found on this route was C$ 304.

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 September is also cheap. Prices for this month can be found on momondo for an average of C$ 464.

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$ 605 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$ 425 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 10% 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 August 2026, prices for Ottawa to Seattle flights are approximately 3% 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$ 238

Fastest flight time

8h 23m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is C$ 238. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is C$ 304.
The fastest flight from Ottawa to Seattle takes 8h 23m
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 23m 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$ 249Free CancellationRating
7.1
11,519 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 264Free CancellationRating
7.4
10,114 reviews
Search United Airlines flights
WestJetPriceFrom C$ 324Free CancellationRating
7.2
3,435 reviews
Search WestJet flights
DeltaPriceFrom C$ 390Free CancellationRating
7.8
8,513 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
Tacoma
Marysville
Redmond
Woodinville
Puyallup
Olympia
Tukwila
Bainbridge Island
Ellensburg
Kent
Edmonds
Chehalis
Renton
Fife
Shoreline
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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