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Cheap flights from Ottawa to Seattle from C$ 257

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 17/9. 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
1:20 p.m. - 6:45 p.m.
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:00 a.m. - 7:20 p.m.
SEA
-
YOW
9h 20m
1 stop
C$ 424WestJet
Thu, 9 Jul - Wed, 15 Jul
WestJet Logo
1:20 p.m. - 6:45 p.m.
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 455WestJet
Sat, 22 Aug - Sat, 29 Aug
WestJet Logo
6:15 p.m. - 6:45 p.m.
YOW
-
SEA
27h 30m
2 stops
WestJet Logo
10:30 a.m. - 12:20 a.m.
SEA
-
YOW
10h 50m
2 stops
C$ 460WestJet
Fri, 21 Aug - Sun, 30 Aug
WestJet Logo
1:20 p.m. - 6:45 p.m.
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 465WestJet
Fri, 25 Sep - Wed, 30 Sep
WestJet Logo
1:20 p.m. - 6:45 p.m.
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 471WestJet
Sat, 19 Sep - Sat, 26 Sep
WestJet Logo
6:15 p.m. - 9:40 a.m.
YOW
-
SEA
18h 25m
2 stops
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 473WestJet
Sat, 18 Jul - Sat, 8 Aug
WestJet Logo
4:15 p.m. - 9:40 a.m.
YOW
-
SEA
20h 25m
1 stop
WestJet Logo
7:00 a.m. - 5:15 p.m.
SEA
-
YOW
7h 15m
1 stop
C$ 475WestJet
Fri, 17 Jul - Mon, 20 Jul
WestJet Logo
7:20 a.m. - 9:40 a.m.
YOW
-
SEA
29h 20m
1 stop
WestJet Logo
7:00 a.m. - 7:20 p.m.
SEA
-
YOW
9h 20m
1 stop
C$ 476WestJet
Sun, 2 Aug - Fri, 7 Aug
WestJet Logo
6:55 a.m. - 6:45 p.m.
YOW
-
SEA
14h 50m
2 stops
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 479WestJet
Sat, 19 Sep - Sat, 26 Sep
WestJet Logo
6:15 p.m. - 9:40 a.m.
YOW
-
SEA
18h 25m
2 stops
WestJet Logo
10:30 a.m. - 12:20 a.m.
SEA
-
YOW
10h 50m
2 stops
C$ 483WestJet
Thu, 20 Aug - Sun, 30 Aug

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
9 Jul
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
15 Jul
SEA7:00 a.m.Seattle/Tacoma Intl
9h 20m
1 stop
YOW7:20 p.m.Ottawa
C$ 424
WestJet
22 Aug
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
29 Aug
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 455
WestJet
21 Aug
YOW6:15 p.m.Ottawa
27h 30m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
30 Aug
SEA10:30 a.m.Seattle/Tacoma Intl
10h 50m
2 stops
YOW12:20 a.m.Ottawa
C$ 460

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
5 Jun
YOW6:25 a.m.Ottawa
12h 55m
2 stops
SEA4:20 p.m.Seattle/Tacoma Intl
6 Jun
SEA7:00 a.m.Seattle/Tacoma Intl
11h 35m
1 stop
YOW9:35 p.m.Ottawa
C$ 796
United Airlines
28 May
YOW6:25 a.m.Ottawa
12h 55m
2 stops
SEA4:20 p.m.Seattle/Tacoma Intl
29 May
SEA11:02 a.m.Seattle/Tacoma Intl
19h 09m
2 stops
YOW9:11 a.m.Ottawa
C$ 901
United Airlines
29 May
YOW5:05 a.m.Ottawa
18h 48m
3 stops
SEA8:53 p.m.Seattle/Tacoma Intl
31 May
SEA11:20 p.m.Seattle/Tacoma Intl
12h 51m
2 stops
YOW3:11 p.m.Ottawa
C$ 956

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 22 May 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

Cheapest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 9/7

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

1 stop8h 25m

Seattle/Tacoma Intl

Wed 15/7

7:00 a.m.-7:20 p.m.

1 stop9h 20m

C$ 424
Quickest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 22/8

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

1 stop8h 25m

Seattle/Tacoma Intl

Sat 29/8

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

1 stop7h 00m

C$ 455

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 21/8

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

2 stops27h 30m

Seattle/Tacoma Intl

Sun 30/8

10:30 a.m.-12:20 a.m.

2 stops10h 50m

C$ 460

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 25/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Wed 30/9

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

1 stop7h 00m

C$ 465

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 19/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Sat 26/9

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

1 stop7h 00m

C$ 471

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 18/7

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

2 stops18h 25m

Seattle/Tacoma Intl

Sat 8/8

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

1 stop7h 00m

C$ 473

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 17/7

4:15 p.m.-9:40 a.m.

1 stop20h 25m

Seattle/Tacoma Intl

Mon 20/7

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

1 stop7h 15m

C$ 475

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 2/8

7:20 a.m.-9:40 a.m.

1 stop29h 20m

Seattle/Tacoma Intl

Fri 7/8

7:00 a.m.-7:20 p.m.

1 stop9h 20m

C$ 476

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 19/9

6:55 a.m.-6:45 p.m.

2 stops14h 50m

Seattle/Tacoma Intl

Sat 26/9

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

1 stop7h 00m

C$ 479

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 20/8

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

2 stops18h 25m

Seattle/Tacoma Intl

Sun 30/8

10:30 a.m.-12:20 a.m.

2 stops10h 50m

C$ 483

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?

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$ 465.

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$ 587 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$ 368 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 57% 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 May 2026, prices for Ottawa to Seattle flights are approximately 40% 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

Fastest flight time

7h 35m

Direct flights

None
The fastest flight from Ottawa to Seattle takes 7h 35m
There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.
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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. 7h 35m 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$ 251Free CancellationRating
7.4
9,752 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 272Free CancellationRating
7.1
11,075 reviews
Search Air Canada flights
WestJetPriceFrom C$ 344Free CancellationRating
7.2
3,342 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
Redmond
Marysville
Kirkland
Woodinville
Tacoma
Puyallup
Tukwila
Olympia
Ocean Shores
Ellensburg
Bainbridge Island
Gig Harbor
Renton
Kent
Edmonds
Centralia
Shelton

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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