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Cheap flights from Ottawa to Seattle from C$ 236

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 27/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 399WestJet
Fri, 29 May - Mon, 1 Jun
WestJet Logo
1:20 p.m. - 6:45 p.m.
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
10:30 a.m. - 12:20 a.m.
SEA
-
YOW
10h 50m
2 stops
C$ 406WestJet
Fri, 29 May - Mon, 1 Jun
WestJet Logo
1:20 p.m. - 6:45 p.m.
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
10:30 a.m. - 12:20 a.m.
SEA
-
YOW
10h 50m
2 stops
C$ 407WestJet
Fri, 29 May - Mon, 1 Jun
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$ 418WestJet
Fri, 29 May - Mon, 1 Jun
WestJet Logo
6:55 a.m. - 6:45 p.m.
YOW
-
SEA
14h 50m
2 stops
WestJet Logo
10:30 a.m. - 12:20 a.m.
SEA
-
YOW
10h 50m
2 stops
C$ 427WestJet
Fri, 29 May - Mon, 1 Jun
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$ 443WestJet
Mon, 27 Apr - Mon, 4 May
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$ 445WestJet
Mon, 20 Apr - Tue, 21 Apr
WestJet Logo
5:45 p.m. - 2:31 p.m.
YOW
-
SEA
23h 46m
1 stop
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 447WestJet
Fri, 24 Apr - Fri, 1 May
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$ 453WestJet
Tue, 14 Apr - Tue, 21 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$ 464WestJet
Wed, 8 Apr - Tue, 14 Apr

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
29 May
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
1 Jun
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 399
WestJet
29 May
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
1 Jun
SEA10:30 a.m.Seattle/Tacoma Intl
10h 50m
2 stops
YOW12:20 a.m.Ottawa
C$ 406
WestJet
29 May
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
1 Jun
SEA10:30 a.m.Seattle/Tacoma Intl
10h 50m
2 stops
YOW12:20 a.m.Ottawa
C$ 407

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
8 Apr
YOW10:00 a.m.Ottawa
13h 53m
1 stop
SEA8:53 p.m.Seattle/Tacoma Intl
14 Apr
SEA7:00 a.m.Seattle/Tacoma Intl
7h 07m
1 stop
YOW5:07 p.m.Ottawa
C$ 519
United Airlines
8 Apr
YOW6:25 a.m.Ottawa
15h 35m
1 stop
SEA7:00 p.m.Seattle/Tacoma Intl
12 Apr
SEA10:35 p.m.Seattle/Tacoma Intl
12h 24m
1 stop
YOW1:59 p.m.Ottawa
C$ 527
United Airlines
8 Apr
YOW6:25 a.m.Ottawa
15h 35m
1 stop
SEA7:00 p.m.Seattle/Tacoma Intl
14 Apr
SEA11:59 p.m.Seattle/Tacoma Intl
11h 00m
1 stop
YOW1:59 p.m.Ottawa
C$ 528

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 15 March 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
Quickest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 29/5

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

1 stop8h 25m

Seattle/Tacoma Intl

Mon 1/6

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

1 stop7h 00m

C$ 399

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 29/5

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

1 stop8h 25m

Seattle/Tacoma Intl

Mon 1/6

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

2 stops10h 50m

C$ 406

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 29/5

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

1 stop8h 25m

Seattle/Tacoma Intl

Mon 1/6

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

2 stops10h 50m

C$ 407

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 29/5

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

1 stop8h 25m

Seattle/Tacoma Intl

Mon 1/6

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

1 stop7h 00m

C$ 418

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 29/5

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

2 stops14h 50m

Seattle/Tacoma Intl

Mon 1/6

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

2 stops10h 50m

C$ 427

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 27/4

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

2 stops18h 25m

Seattle/Tacoma Intl

Mon 4/5

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

1 stop7h 00m

C$ 443

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 20/4

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

2 stops11h 39m

Seattle/Tacoma Intl

Tue 21/4

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

2 stops30h 29m

C$ 445

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 24/4

5:45 p.m.-2:31 p.m.

1 stop23h 46m

Seattle/Tacoma Intl

Fri 1/5

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

1 stop7h 00m

C$ 447

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 14/4

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

1 stop23h 34m

Seattle/Tacoma Intl

Tue 21/4

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

2 stops30h 29m

C$ 453

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$ 464

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$ 462.

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$ 558 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$ 414 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 72% 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 March 2026, prices for Ottawa to Seattle flights are approximately 62% 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 52m

Direct flights

None
The fastest flight from Ottawa to Seattle takes 7h 52m
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 52m 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$ 250Free CancellationRating
7.4
9,427 reviews
Search United Airlines flights
WestJetPriceFrom C$ 342Free CancellationRating
7.2
3,295 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 365Free CancellationRating
7.1
10,801 reviews
Search Air Canada 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
Puyallup
Tukwila
Olympia
Ocean Shores
Ellensburg
Bainbridge Island
Gig Harbor
Renton
Centralia
Kent
Edmonds
Federal Way
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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