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Cheap flights from Ottawa to Seattle from C$ 237

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 23/4. 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 39m
2 stops
WestJet Logo
3:10 p.m. - 4:53 p.m.
SEA
-
YOW
22h 43m
1 stop
C$ 382WestJet
Wed, 8 Apr - Tue, 14 Apr
WestJet Logo
5:40 a.m. - 2:19 p.m.
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:10 p.m. - 12:39 a.m.
SEA
-
YOW
30h 29m
2 stops
C$ 390WestJet
Wed, 8 Apr - Tue, 14 Apr
WestJet Logo
5:40 a.m. - 2:19 p.m.
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:10 p.m. - 12:39 a.m.
SEA
-
YOW
30h 29m
2 stops
C$ 391WestJet
Wed, 8 Apr - Tue, 14 Apr
WestJet Logo
5:40 a.m. - 2:19 p.m.
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:10 p.m. - 12:39 a.m.
SEA
-
YOW
30h 29m
2 stops
C$ 410WestJet
Wed, 11 Mar - Wed, 18 Mar
WestJet Logo
5:45 p.m. - 2:19 p.m.
YOW
-
SEA
23h 34m
1 stop
WestJet Logo
3:10 p.m. - 4:53 p.m.
SEA
-
YOW
22h 43m
1 stop
C$ 414WestJet
Wed, 8 Apr - Tue, 14 Apr
Air Canada Logo
5:50 p.m. - 10:57 p.m.
YOW
-
SEA
8h 07m
1 stop
Air Canada Logo
8:00 a.m. - 6:38 p.m.
SEA
-
YOW
7h 38m
1 stop
C$ 423Air Canada
Mon, 9 Mar - Sun, 15 Mar
WestJet Logo
5:45 p.m. - 2:19 p.m.
YOW
-
SEA
23h 34m
1 stop
WestJet Logo
3:10 p.m. - 12:39 a.m.
SEA
-
YOW
30h 29m
2 stops
C$ 424WestJet
Wed, 8 Apr - Tue, 14 Apr
Air Canada Logo
2:05 p.m. - 10:57 p.m.
YOW
-
SEA
11h 52m
2 stops
Air Canada Logo
8:00 a.m. - 7:18 p.m.
SEA
-
YOW
8h 18m
1 stop
C$ 440Air Canada
Mon, 9 Mar - Sun, 15 Mar
Air Canada Logo
5:50 p.m. - 10:56 p.m.
YOW
-
SEA
8h 06m
1 stop
Air Canada Logo
8:00 p.m. - 8:18 a.m.
SEA
-
YOW
9h 18m
2 stops
C$ 447Air Canada
Thu, 5 Mar - Wed, 11 Mar
WestJet Logo
4:15 p.m. - 6:45 p.m.
YOW
-
SEA
29h 30m
1 stop
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 450WestJet
Fri, 15 May - Sat, 23 May

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
8 Apr
YOW6:25 a.m.Ottawa
19h 12m
1 stop
SEA10:37 p.m.Seattle/Tacoma Intl
14 Apr
SEA5:45 p.m.Seattle/Tacoma Intl
17h 14m
2 stops
YOW1:59 p.m.Ottawa
C$ 476
United Airlines
9 Apr
YOW10:44 a.m.Ottawa
16h 35m
1 stop
SEA12:19 a.m.Seattle/Tacoma Intl
12 Apr
SEA7:05 p.m.Seattle/Tacoma Intl
11h 58m
2 stops
YOW10:03 a.m.Ottawa
C$ 488
United Airlines
9 Apr
YOW6:00 a.m.Ottawa
21h 19m
3 stops
SEA12:19 a.m.Seattle/Tacoma Intl
12 Apr
SEA10:35 p.m.Seattle/Tacoma Intl
15h 32m
1 stop
YOW5:07 p.m.Ottawa
C$ 490

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
8 Apr
YOW5:40 a.m.Ottawa
11h 39m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
14 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 p.m.Ottawa
C$ 382
WestJet
8 Apr
YOW5:40 a.m.Ottawa
11h 39m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
14 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
30h 29m
2 stops
YOW12:39 a.m.Ottawa
C$ 390
WestJet
8 Apr
YOW5:40 a.m.Ottawa
11h 39m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
14 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
30h 29m
2 stops
YOW12:39 a.m.Ottawa
C$ 391

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 23 February 2026.
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

Wed 8/4

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

2 stops11h 39m

Seattle/Tacoma Intl

Tue 14/4

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

1 stop22h 43m

C$ 382

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 8/4

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

2 stops11h 39m

Seattle/Tacoma Intl

Tue 14/4

3:10 p.m.-12:39 a.m.

2 stops30h 29m

C$ 390

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 8/4

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

2 stops11h 39m

Seattle/Tacoma Intl

Tue 14/4

3:10 p.m.-12:39 a.m.

2 stops30h 29m

C$ 391

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 11/3

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

2 stops11h 39m

Seattle/Tacoma Intl

Wed 18/3

3:10 p.m.-12:39 a.m.

2 stops30h 29m

C$ 410

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 8/4

5:45 p.m.-2:19 p.m.

1 stop23h 34m

Seattle/Tacoma Intl

Tue 14/4

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

1 stop22h 43m

C$ 414

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 9/3

5:50 p.m.-10:57 p.m.

1 stop8h 07m

Seattle/Tacoma Intl

Sun 15/3

8:00 a.m.-6:38 p.m.

1 stop7h 38m

C$ 423

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 8/4

5:45 p.m.-2:19 p.m.

1 stop23h 34m

Seattle/Tacoma Intl

Tue 14/4

3:10 p.m.-12:39 a.m.

2 stops30h 29m

C$ 424

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 9/3

2:05 p.m.-10:57 p.m.

2 stops11h 52m

Seattle/Tacoma Intl

Sun 15/3

8:00 a.m.-7:18 p.m.

1 stop8h 18m

C$ 440

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 5/3

5:50 p.m.-10:56 p.m.

1 stop8h 06m

Seattle/Tacoma Intl

Wed 11/3

8:00 p.m.-8:18 a.m.

2 stops9h 18m

C$ 447

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 15/5

4:15 p.m.-6:45 p.m.

1 stop29h 30m

Seattle/Tacoma Intl

Sat 23/5

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

1 stop7h 00m

C$ 450

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 January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of C$ 461.

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$ 545 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$ 423 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 53% 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 February 2026, prices for Ottawa to Seattle flights are approximately 6% 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

Fastest flight time

7h 37m

Direct flights

None
The fastest flight from Ottawa to Seattle takes 7h 37m
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 37m 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
United AirlinesPriceFrom C$ 262Free CancellationRating
7.4
9,342 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 328Free CancellationRating
7.1
10,739 reviews
Search Air Canada flights
WestJetPriceFrom C$ 341Free CancellationRating
7.2
3,273 reviews
Search WestJet flights

Travelling to a place near Seattle?

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

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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