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Cheap flights from Ottawa to Seattle from C$ 300

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 17/8. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ottawa to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
12:25 p.m. - 9:00 p.m.
YOW
-
SEA
11h 35m
2 stops
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 510WestJet
Wed, 12 Aug - Sat, 22 Aug
WestJet Logo
12:25 p.m. - 9:00 p.m.
YOW
-
SEA
11h 35m
2 stops
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 514WestJet
Sat, 15 Aug - Sun, 23 Aug
WestJet Logo
12:25 p.m. - 9:00 p.m.
YOW
-
SEA
11h 35m
2 stops
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 515WestJet
Sat, 15 Aug - Sat, 22 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$ 521WestJet
Wed, 30 Sep - Sun, 4 Oct
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$ 522WestJet
Wed, 30 Sep - Sun, 4 Oct
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$ 528WestJet
Fri, 7 Aug - Thu, 13 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$ 529WestJet
Wed, 30 Sep - Sun, 4 Oct
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$ 531WestJet
Wed, 30 Sep - Sun, 4 Oct
WestJet Logo
12:25 p.m. - 6:45 p.m.
YOW
-
SEA
9h 20m
2 stops
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 532WestJet
Fri, 7 Aug - Fri, 21 Aug
WestJet Logo
12:25 p.m. - 9:00 p.m.
YOW
-
SEA
11h 35m
2 stops
WestJet Logo
7:35 p.m. - 5:35 a.m.
SEA
-
YOW
7h 00m
1 stop
C$ 534WestJet
Fri, 7 Aug - Thu, 13 Aug

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
12 Aug
YOW12:25 p.m.Ottawa
11h 35m
2 stops
SEA9:00 p.m.Seattle/Tacoma Intl
22 Aug
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 510
WestJet
15 Aug
YOW12:25 p.m.Ottawa
11h 35m
2 stops
SEA9:00 p.m.Seattle/Tacoma Intl
23 Aug
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 514
WestJet
15 Aug
YOW12:25 p.m.Ottawa
11h 35m
2 stops
SEA9:00 p.m.Seattle/Tacoma Intl
22 Aug
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 515

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
15 Jul
YOW6:05 a.m.Ottawa
11h 11m
1 stop
SEA2:16 p.m.Seattle/Tacoma Intl
22 Jul
SEA3:23 p.m.Seattle/Tacoma Intl
14h 48m
1 stop
YOW9:11 a.m.Ottawa
C$ 720
United Airlines
24 Jul
YOW5:50 p.m.Ottawa
17h 10m
2 stops
SEA8:00 a.m.Seattle/Tacoma Intl
3 Aug
SEA5:15 p.m.Seattle/Tacoma Intl
17h 44m
1 stop
YOW1:59 p.m.Ottawa
C$ 723
United Airlines
25 Jul
YOW5:20 p.m.Ottawa
8h 36m
1 stop
SEA10:56 p.m.Seattle/Tacoma Intl
4 Aug
SEA5:00 a.m.Seattle/Tacoma Intl
14h 05m
2 stops
YOW10:05 p.m.Ottawa
C$ 747

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 12 July 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

Wed 12/8

12:25 p.m.-9:00 p.m.

2 stops11h 35m

Seattle/Tacoma Intl

Sat 22/8

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

1 stop7h 00m

C$ 510

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 15/8

12:25 p.m.-9:00 p.m.

2 stops11h 35m

Seattle/Tacoma Intl

Sun 23/8

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

1 stop7h 00m

C$ 514

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 15/8

12:25 p.m.-9:00 p.m.

2 stops11h 35m

Seattle/Tacoma Intl

Sat 22/8

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

1 stop7h 00m

C$ 515
Quickest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 30/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Sun 4/10

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

1 stop7h 00m

C$ 521

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 30/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Sun 4/10

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

1 stop7h 00m

C$ 522

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 7/8

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

1 stop8h 25m

Seattle/Tacoma Intl

Thu 13/8

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

1 stop7h 00m

C$ 528

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 30/9

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

2 stops14h 50m

Seattle/Tacoma Intl

Sun 4/10

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

1 stop7h 00m

C$ 529

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 30/9

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

2 stops14h 50m

Seattle/Tacoma Intl

Sun 4/10

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

1 stop7h 00m

C$ 531

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 7/8

12:25 p.m.-6:45 p.m.

2 stops9h 20m

Seattle/Tacoma Intl

Fri 21/8

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

1 stop7h 00m

C$ 532

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 7/8

12:25 p.m.-9:00 p.m.

2 stops11h 35m

Seattle/Tacoma Intl

Thu 13/8

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

1 stop7h 00m

C$ 534

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$ 476.

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$ 614 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$ 378 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 59% 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 July 2026, prices for Ottawa to Seattle flights are approximately 49% 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

8h 25m

Direct flights

None
The fastest flight from Ottawa to Seattle takes 8h 25m
There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.
Search flight deals

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. 8h 25m 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$ 258Free CancellationRating
7.4
9,982 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 273Free CancellationRating
7.1
11,332 reviews
Search Air Canada flights
WestJetPriceFrom C$ 345Free CancellationRating
7.2
3,409 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
Kirkland
Tacoma
Marysville
Woodinville
Puyallup
Tukwila
Olympia
Ellensburg
Federal Way
Bainbridge Island
Gig Harbor
Kent
Edmonds
Shoreline
Ocean Shores
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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