Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ottawa to Seattle from C$ 280

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 18/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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
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$ 499WestJet
Sat, 12 Sep - Mon, 14 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$ 503WestJet
Mon, 14 Sep - Mon, 28 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$ 506WestJet
Sun, 16 Aug - Sun, 23 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$ 509WestJet
Wed, 9 Sep - Sun, 13 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$ 510WestJet
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$ 512WestJet
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$ 519WestJet
Wed, 12 Aug - Sat, 22 Aug
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$ 520WestJet
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$ 521WestJet
Mon, 14 Sep - Mon, 28 Sep
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$ 524WestJet
Sun, 6 Sep - Mon, 14 Sep

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
12 Sep
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
14 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 499
WestJet
14 Sep
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
28 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 503
WestJet
16 Aug
YOW1:20 p.m.Ottawa
8h 25m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
23 Aug
SEA7:35 p.m.Seattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 a.m.Ottawa
C$ 506

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
5 Aug
YOW2:52 p.m.Ottawa
8h 54m
1 stop
SEA8:46 p.m.Seattle/Tacoma Intl
14 Aug
SEA6:10 p.m.Seattle/Tacoma Intl
12h 46m
2 stops
YOW9:56 a.m.Ottawa
C$ 733
United Airlines
3 Aug
YOW5:50 p.m.Ottawa
17h 10m
2 stops
SEA8:00 a.m.Seattle/Tacoma Intl
7 Aug
SEA8:05 p.m.Seattle/Tacoma Intl
17h 33m
2 stops
YOW4:38 p.m.Ottawa
C$ 751
United Airlines
4 Aug
YOW6:05 a.m.Ottawa
12h 55m
2 stops
SEA4:00 p.m.Seattle/Tacoma Intl
12 Aug
SEA3:54 p.m.Seattle/Tacoma Intl
15h 02m
2 stops
YOW9:56 a.m.Ottawa
C$ 958

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 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
Quickest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 12/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Mon 14/9

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

1 stop7h 00m

C$ 499

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 14/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Mon 28/9

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

1 stop7h 00m

C$ 503

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 16/8

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

1 stop8h 25m

Seattle/Tacoma Intl

Sun 23/8

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

1 stop7h 00m

C$ 506

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 9/9

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

1 stop8h 25m

Seattle/Tacoma Intl

Sun 13/9

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

1 stop7h 00m

C$ 509

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$ 510

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$ 512

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 12/8

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

2 stops9h 20m

Seattle/Tacoma Intl

Sat 22/8

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

1 stop7h 00m

C$ 519

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

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

2 stops10h 50m

C$ 520

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 14/9

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

2 stops14h 50m

Seattle/Tacoma Intl

Mon 28/9

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

1 stop7h 00m

C$ 521

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 6/9

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

2 stops14h 50m

Seattle/Tacoma Intl

Mon 14/9

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

1 stop7h 00m

C$ 524

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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$ 475.

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$ 607 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$ 435 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 10% 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$ 257Free CancellationRating
7.4
10,024 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 272Free CancellationRating
7.1
11,371 reviews
Search Air Canada flights
WestJetPriceFrom C$ 343Free CancellationRating
7.2
3,411 reviews
Search WestJet flights
DeltaPriceFrom C$ 400Free CancellationRating
7.8
8,479 reviews
Search Delta flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
SeaTac
Leavenworth
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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 21/8
Fri 28/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States