Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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 28/5. 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

Discover deals from 900+ travel sites with momondo.

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.

Find the cheapest flights from Ottawa to Seattle

Cheap round-trip flights

These are some of the best round-trip flight deals from Ottawa to Seattle that have been recently found on momondo from popular airlines, departing in the coming months.
WestJet Logo
6:00 a.m. - 12:58 p.m.YOW-SEA
9h 58m1 stop
WestJet Logo
7:05 a.m. - 6:21 p.m.SEA-YOW
8h 16m1 stop
C$ 453WestJet
Find Deal
Wed, 28 May - Wed, 11 Jun
WestJet Logo
6:10 a.m. - 12:58 p.m.YOW-SEA
9h 48m2 stops
WestJet Logo
2:05 p.m. - 12:41 a.m.SEA-YOW
7h 36m1 stop
C$ 456WestJet
Find Deal
Tue, 27 May - Tue, 3 Jun
WestJet Logo
6:00 a.m. - 12:58 p.m.YOW-SEA
9h 58m1 stop
WestJet Logo
7:05 a.m. - 6:21 p.m.SEA-YOW
8h 16m1 stop
C$ 457WestJet
Find Deal
Tue, 27 May - Tue, 3 Jun
WestJet Logo
6:10 a.m. - 12:58 p.m.YOW-SEA
9h 48m2 stops
WestJet Logo
7:05 a.m. - 6:21 p.m.SEA-YOW
8h 16m1 stop
C$ 464WestJet
Find Deal
Wed, 28 May - Wed, 11 Jun
 Logo
9:05 a.m. - 12:10 a.m.YOW-SEA
18h 05m1 stop
 Logo
3:20 p.m. - 10:21 a.m.SEA-YOW
16h 01m2 stops
C$ 484
Find Deal
Wed, 21 May - Tue, 3 Jun
 Logo
3:45 p.m. - 12:10 a.m.YOW-SEA
35h 25m2 stops
 Logo
3:20 p.m. - 7:55 p.m.SEA-YOW
25h 35m1 stop
C$ 511
Find Deal
Thu, 22 May - Tue, 3 Jun
Air Canada Logo
2:35 p.m. - 7:37 p.m.YOW-SEA
8h 02m1 stop
Air Canada Logo
7:20 a.m. - 8:17 p.m.SEA-YOW
9h 57m1 stop
C$ 540Air Canada
Find Deal
Thu, 22 May - Tue, 3 Jun
Air Canada Logo
2:35 p.m. - 7:37 p.m.YOW-SEA
8h 02m1 stop
Air Canada Logo
11:35 a.m. - 12:19 a.m.SEA-YOW
9h 44m1 stop
C$ 549Air Canada
Find Deal
Thu, 22 May - Fri, 13 Jun
United Airlines Logo
6:33 a.m. - 9:57 p.m.YOW-SEA
18h 24m2 stops
United Airlines Logo
12:35 p.m. - 9:11 a.m.SEA-YOW
17h 36m3 stops
C$ 590United Airlines
Find Deal
Wed, 21 May - Tue, 3 Jun
United Airlines Logo
5:15 a.m. - 10:45 a.m.YOW-SEA
8h 30m1 stop
United Airlines Logo
12:35 p.m. - 9:11 a.m.SEA-YOW
17h 36m3 stops
C$ 591United Airlines
Find Deal
Thu, 22 May - Tue, 27 May

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
22 May
YOW2:35 p.m.Ottawa
8h 02m
1 stop
SEA7:37 p.m.Seattle/Tacoma Intl
3 Jun
SEA7:20 a.m.Seattle/Tacoma Intl
9h 57m
1 stop
YOW8:17 p.m.Ottawa
Air Canada
22 May
YOW2:35 p.m.Ottawa
8h 02m
1 stop
SEA7:37 p.m.Seattle/Tacoma Intl
13 Jun
SEA11:35 a.m.Seattle/Tacoma Intl
9h 44m
1 stop
YOW12:19 a.m.Ottawa
Air Canada
1 Jul
YOW6:00 p.m.Ottawa
7h 16m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
7 Jul
SEA5:30 a.m.Seattle/Tacoma Intl
7h 46m
1 stop
YOW4:16 p.m.Ottawa

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
21 May
YOW6:33 a.m.Ottawa
18h 24m
2 stops
SEA9:57 p.m.Seattle/Tacoma Intl
3 Jun
SEA12:35 p.m.Seattle/Tacoma Intl
17h 36m
3 stops
YOW9:11 a.m.Ottawa
United Airlines
22 May
YOW5:15 a.m.Ottawa
8h 30m
1 stop
SEA10:45 a.m.Seattle/Tacoma Intl
27 May
SEA12:35 p.m.Seattle/Tacoma Intl
17h 36m
3 stops
YOW9:11 a.m.Ottawa
United Airlines
27 May
YOW5:15 a.m.Ottawa
13h 23m
2 stops
SEA3:38 p.m.Seattle/Tacoma Intl
3 Jun
SEA12:35 p.m.Seattle/Tacoma Intl
17h 36m
3 stops
YOW9:11 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 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 March, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 546.

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$ 590. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around C$ 671. 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$ 593. Flights at noon are often more expensive with an average ticket price of C$ 691.

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 23 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 600 when searching 23 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$ 456 on momondo.

How have Ottawa to Seattle flight prices changed over time?

As of April 2025, prices for Ottawa to Seattle flights are approximately 42% 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

Best price found

C$ 256

Fastest flight time

7h 13m

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$ 453.
The fastest flight from Ottawa to Seattle takes 7h 13m
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$ 346Free CancellationRating
7.2
2,826 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 373Free CancellationRating
7.0
9,245 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 475Free CancellationRating
7.4
8,696 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
SeaTac
Tacoma
Olympia
Kirkland
Tukwila
Kent
Lynnwood
Ellensburg
Redmond
Lakewood
Ocean Shores
Shoreline
Mukilteo
Renton
Gig Harbor
Cle Elum
Poulsbo
Centralia

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 5/5
Mon 12/5

Find better results for your trip to the United States