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Cheap flights from Ottawa to Seattle from C$ 256

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 29/8. 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

WestJet Logo
3:45 p.m. - 8:29 p.m.YOW-SEA
7h 44m1 stop
WestJet Logo
2:05 p.m. - 12:40 a.m.SEA-YOW
7h 35m1 stop
C$ 405WestJet
Find Deal
Thu, 4 Sep - Sun, 14 Sep
WestJet Logo
6:00 a.m. - 12:59 p.m.YOW-SEA
9h 59m1 stop
WestJet Logo
2:05 p.m. - 5:23 a.m.SEA-YOW
12h 18m2 stops
C$ 418WestJet
Find Deal
Thu, 4 Sep - Sun, 14 Sep
Air Canada Logo
2:25 p.m. - 8:41 p.m.YOW-SEA
9h 16m1 stop
Air Canada Logo
5:30 a.m. - 7:56 p.m.SEA-YOW
11h 26m2 stops
C$ 446Air Canada
Find Deal
Mon, 11 Aug - Mon, 18 Aug
Air Canada Logo
2:25 p.m. - 8:41 p.m.YOW-SEA
9h 16m1 stop
Air Canada Logo
12:05 p.m. - 12:20 a.m.SEA-YOW
9h 15m1 stop
C$ 466Air Canada
Find Deal
Mon, 11 Aug - Mon, 18 Aug
 Logo
6:10 a.m. - 8:28 p.m.YOW-SEA
17h 18m2 stops
 Logo
1:15 p.m. - 1:05 p.m.SEA-YOW
20h 50m1 stop
C$ 558
Find Deal
Fri, 11 Jul - Fri, 18 Jul
United Airlines Logo
6:33 a.m. - 3:34 p.m.YOW-SEA
12h 01m1 stop
United Airlines Logo
5:00 a.m. - 9:35 p.m.SEA-YOW
13h 35m2 stops
C$ 559United Airlines
Find Deal
Sat, 23 Aug - Sat, 27 Sep
 Logo
5:15 p.m. - 8:28 p.m.YOW-SEA
30h 13m2 stops
 Logo
5:30 p.m. - 5:25 a.m.SEA-YOW
32h 55m3 stops
C$ 569
Find Deal
Thu, 17 Jul - Mon, 28 Jul
United Airlines Logo
5:50 p.m. - 8:01 a.m.YOW-SEA
17h 11m2 stops
United Airlines Logo
7:02 p.m. - 5:06 p.m.SEA-YOW
19h 04m2 stops
C$ 581United Airlines
Find Deal
Fri, 11 Jul - Fri, 18 Jul
Delta Logo
3:45 p.m. - 8:28 p.m.YOW-SEA
7h 43m1 stop
Delta Logo
2:05 p.m. - 12:41 a.m.SEA-YOW
7h 36m1 stop
C$ 1,459Delta
Find Deal
Wed, 16 Jul - Tue, 22 Jul
Delta Logo
3:45 p.m. - 8:28 p.m.YOW-SEA
7h 43m1 stop
Delta Logo
6:00 a.m. - 12:22 a.m.SEA-YOW
15h 22m2 stops
C$ 1,559Delta
Find Deal
Wed, 16 Jul - Tue, 22 Jul

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
4 Sep
YOW3:45 p.m.Ottawa
7h 44m
1 stop
SEA8:29 p.m.Seattle/Tacoma Intl
14 Sep
SEA2:05 p.m.Seattle/Tacoma Intl
7h 35m
1 stop
YOW12:40 a.m.Ottawa
WestJet
4 Sep
YOW6:00 a.m.Ottawa
9h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
14 Sep
SEA2:05 p.m.Seattle/Tacoma Intl
12h 18m
2 stops
YOW5:23 a.m.Ottawa
WestJet
22 Aug
YOW6:10 a.m.Ottawa
9h 48m
2 stops
SEA12:58 p.m.Seattle/Tacoma Intl
30 Sep
SEA2:05 p.m.Seattle/Tacoma Intl
7h 35m
1 stop
YOW12:40 a.m.Ottawa

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
11 Aug
YOW2:25 p.m.Ottawa
9h 16m
1 stop
SEA8:41 p.m.Seattle/Tacoma Intl
18 Aug
SEA5:30 a.m.Seattle/Tacoma Intl
11h 26m
2 stops
YOW7:56 p.m.Ottawa
Air Canada
11 Aug
YOW2:25 p.m.Ottawa
9h 16m
1 stop
SEA8:41 p.m.Seattle/Tacoma Intl
18 Aug
SEA12:05 p.m.Seattle/Tacoma Intl
9h 15m
1 stop
YOW12:20 a.m.Ottawa
Air Canada
19 Aug
YOW6:00 p.m.Ottawa
7h 16m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
27 Sep
SEA12:00 p.m.Seattle/Tacoma Intl
9h 19m
1 stop
YOW12:19 a.m.Ottawa

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 August, then flying in March is also cheap. Prices for this month can be found on momondo for an average of C$ 529.

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$ 584. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around C$ 664. 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$ 587. Flights at noon are often more expensive with an average ticket price of C$ 684.

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 20 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 578 when searching 20 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$ 420 on momondo.

How have Ottawa to Seattle flight prices changed over time?

As of June 2025, prices for Ottawa to Seattle flights are approximately 7% 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$ 256

Fastest flight time

7h 16m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Ottawa in the past 72 hours is C$ 256. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is C$ 405.
The fastest flight from Ottawa to Seattle takes 7h 16m
There are no direct flights from Ottawa to Seattle. Popular non-direct route for this connection is Ottawa Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

  • How far is Ottawa to Seattle/Tacoma Intl by plane?

    The distance between Ottawa and Seattle/Tacoma Intl is about 3521.0 km. 7h 16m 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$ 342Free CancellationRating
7.2
2,868 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 371Free CancellationRating
7.1
9,537 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 470Free CancellationRating
7.4
8,790 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
Marysville
Lynnwood
SeaTac
Tacoma
Olympia
Kirkland
Tukwila
Kent
Ellensburg
Redmond
Lakewood
Ocean Shores
Shoreline
Renton
Gig Harbor
Mukilteo
Cle Elum
Poulsbo
Puyallup

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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