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Cheap flights from Ottawa to Seattle from C$ 197

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 1/2. 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

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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 39m2 stops
WestJet Logo
3:10 p.m. - 4:53 p.m.
SEA
-
YOW
22h 43m1 stop
C$ 331WestJet
Wed, 8 Apr - Tue, 14 Apr
WestJet Logo
5:40 a.m. - 2:19 p.m.
YOW
-
SEA
11h 39m2 stops
WestJet Logo
3:10 p.m. - 12:39 a.m.
SEA
-
YOW
30h 29m2 stops
C$ 338WestJet
Wed, 8 Apr - Tue, 14 Apr
WestJet Logo
5:15 p.m. - 8:28 p.m.
YOW
-
SEA
30h 13m2 stops
WestJet Logo
7:05 a.m. - 5:28 a.m.
SEA
-
YOW
19h 23m2 stops
C$ 342WestJet
Fri, 15 May - Tue, 19 May
WestJet Logo
6:15 a.m. - 1:08 p.m.
YOW
-
SEA
33h 53m2 stops
WestJet Logo
7:05 a.m. - 12:40 a.m.
SEA
-
YOW
14h 35m1 stop
C$ 344WestJet
Fri, 15 May - Tue, 19 May
WestJet Logo
3:45 p.m. - 1:08 p.m.
YOW
-
SEA
24h 23m1 stop
WestJet Logo
7:05 a.m. - 2:55 p.m.
SEA
-
YOW
28h 50m1 stop
C$ 347WestJet
Fri, 15 May - Tue, 19 May
WestJet Logo
5:45 p.m. - 2:19 p.m.
YOW
-
SEA
23h 34m1 stop
WestJet Logo
3:10 p.m. - 4:53 p.m.
SEA
-
YOW
22h 43m1 stop
C$ 351WestJet
Wed, 8 Apr - Tue, 14 Apr
WestJet Logo
5:40 a.m. - 2:19 p.m.
YOW
-
SEA
11h 39m2 stops
WestJet Logo
3:10 p.m. - 4:53 p.m.
SEA
-
YOW
22h 43m1 stop
C$ 354WestJet
Wed, 8 Apr - Tue, 14 Apr
WestJet Logo
5:40 a.m. - 2:19 p.m.
YOW
-
SEA
11h 39m2 stops
WestJet Logo
3:10 p.m. - 12:39 a.m.
SEA
-
YOW
30h 29m2 stops
C$ 361WestJet
Wed, 8 Apr - Tue, 14 Apr
Air Canada Logo
4:15 p.m. - 10:16 p.m.
YOW
-
SEA
9h 01m1 stop
Air Canada Logo
5:50 a.m. - 3:46 p.m.
SEA
-
YOW
6h 56m1 stop
C$ 376Air Canada
Tue, 13 Jan - Tue, 20 Jan
Air Canada Logo
4:15 p.m. - 10:16 p.m.
YOW
-
SEA
9h 01m1 stop
Air Canada Logo
5:50 a.m. - 7:15 p.m.
SEA
-
YOW
10h 25m2 stops
C$ 387Air Canada
Tue, 13 Jan - Tue, 20 Jan

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
13 Jan
YOW4:15 p.m.Ottawa
9h 01m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
20 Jan
SEA5:50 a.m.Seattle/Tacoma Intl
6h 56m
1 stop
YOW3:46 p.m.Ottawa
C$ 376
Find similar
Air Canada
13 Jan
YOW4:15 p.m.Ottawa
9h 01m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
20 Jan
SEA5:50 a.m.Seattle/Tacoma Intl
10h 25m
2 stops
YOW7:15 p.m.Ottawa
C$ 387
Find similar
Air Canada
31 Jan
YOW5:35 p.m.Ottawa
18h 56m
2 stops
SEA9:31 a.m.Seattle/Tacoma Intl
7 Feb
SEA5:50 a.m.Seattle/Tacoma Intl
6h 55m
1 stop
YOW3:45 p.m.Ottawa
C$ 409
Find similar

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
20 Jan
YOW7:27 p.m.Ottawa
25h 59m
2 stops
SEA6:26 p.m.Seattle/Tacoma Intl
22 Jan
SEA7:00 a.m.Seattle/Tacoma Intl
11h 18m
1 stop
YOW9:18 p.m.Ottawa
C$ 413
Find similar
United Airlines
3 Feb
YOW5:11 p.m.Ottawa
21h 18m
2 stops
SEA11:29 a.m.Seattle/Tacoma Intl
4 Feb
SEA11:45 p.m.Seattle/Tacoma Intl
10h 47m
1 stop
YOW1:32 p.m.Ottawa
C$ 423
Find similar
United Airlines
22 Dec
YOW7:27 p.m.Ottawa
19h 00m
1 stop
SEA11:27 a.m.Seattle/Tacoma Intl
2 Jan
SEA7:00 a.m.Seattle/Tacoma Intl
11h 18m
1 stop
YOW9:18 p.m.Ottawa
C$ 1,062
Find similar

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 18 December 2025.
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$ 331

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$ 338

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 15/5

5:15 p.m.-8:28 p.m.

2 stops30h 13m

Seattle/Tacoma Intl

Tue 19/5

7:05 a.m.-5:28 a.m.

2 stops19h 23m

C$ 342

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 15/5

6:15 a.m.-1:08 p.m.

2 stops33h 53m

Seattle/Tacoma Intl

Tue 19/5

7:05 a.m.-12:40 a.m.

1 stop14h 35m

C$ 344

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 15/5

3:45 p.m.-1:08 p.m.

1 stop24h 23m

Seattle/Tacoma Intl

Tue 19/5

7:05 a.m.-2:55 p.m.

1 stop28h 50m

C$ 347

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$ 351

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$ 354

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$ 361

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 13/1

4:15 p.m.-10:16 p.m.

1 stop9h 01m

Seattle/Tacoma Intl

Tue 20/1

5:50 a.m.-3:46 p.m.

1 stop6h 56m

C$ 376

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 13/1

4:15 p.m.-10:16 p.m.

1 stop9h 01m

Seattle/Tacoma Intl

Tue 20/1

5:50 a.m.-7:15 p.m.

2 stops10h 25m

C$ 387

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 September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of C$ 499.

What is the cheapest day to depart on your flight to Seattle?

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 589. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around C$ 669. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Ottawa to Seattle during this time can be as low as C$ 591. Flights at noon are often more expensive with an average ticket price of C$ 689.

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$ 568 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$ 426 on momondo.

How have Ottawa to Seattle flight prices changed over time?

As of December 2025, prices for Ottawa to Seattle flights are approximately 18% 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 43m

Direct flights

None
The fastest flight from Ottawa to Seattle takes 7h 43m
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 43m 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
WestJetPriceFrom C$ 362Free CancellationRating
7.2
3,204 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 405Free CancellationRating
7.1
10,534 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 417Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights

Travelling to a place near Seattle?

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

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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