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Cheap flights from Seattle to Ottawa from $160

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Ottawa departing on 9/21. 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 Seattle to Ottawa

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
WestJet Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
$363WestJet
Thu, Sep 24 - Wed, Sep 30
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
WestJet Logo
4:15 pm - 9:40 amYOW  Ottawa-SEA Seattle/Tacoma Intl
20h 25m1 stop Calgary
$365WestJet
Wed, Sep 16 - Wed, Sep 23
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
WestJet Logo
12:25 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 20m2 stops Winnipeg Calgary
$380WestJet
Wed, Oct 14 - Sun, Oct 18
Multiple Airlines Logo
9:45 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
28h 50m2 stops Las Vegas Harry Reid Intl Calgary
Multiple Airlines Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
$422Multiple Airlines
Wed, Sep 9 - Sat, Sep 12
Multiple Airlines Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
Multiple Airlines Logo
2:00 pm - 9:40 amYOW  Ottawa-SEA Seattle/Tacoma Intl
22h 40m2 stops Hamilton Calgary
$446Multiple Airlines
Thu, Sep 24 - Sun, Sep 27
Multiple Airlines Logo
10:30 am - 12:25 amSEA  Seattle/Tacoma Intl-YOW Ottawa
10h 55m2 stops Calgary Toronto Pearson Intl
Multiple Airlines Logo
6:55 am - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
14h 50m2 stops Toronto Pearson Intl Calgary
$448Multiple Airlines
Tue, Sep 15 - Wed, Sep 30
Air Canada Logo
5:40 am - 4:23 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 43m1 stop Vancouver Intl
Air Canada Logo
2:00 pm - 8:59 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 59m1 stop Toronto Pearson Intl
$550Air Canada
Sat, Oct 24 - Sat, Oct 31
Air Canada Logo
5:40 am - 5:15 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
8h 35m2 stops Vancouver Intl Calgary
Air Canada Logo
7:50 am - 6:22 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
13h 32m2 stops Calgary Vancouver Intl
$663Air Canada
Sat, Oct 24 - Sat, Oct 31
United Airlines Logo
8:10 am - 11:54 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
12h 44m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
6:25 am - 11:32 amYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 07m1 stop Chicago O'Hare Intl
$672United Airlines
Wed, Sep 9 - Fri, Sep 18
United Airlines Logo
5:00 am - 11:54 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
15h 54m2 stops Denver Intl Washington, D.C. Dulles Intl
United Airlines Logo
6:00 am - 10:56 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
19h 56m3 stops Washington, D.C. Dulles Intl Indianapolis Chicago O'Hare Intl
$693United Airlines
Sun, Sep 20 - Sun, Sep 27

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WestJet flights from Seattle to Ottawa

Our best WestJet deals on Seattle to Ottawa flight tickets
WestJet
Sep 24
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
Sep 30
YOW1:20 pmOttawa
8h 25m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
$363
WestJet
Sep 16
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
Sep 23
YOW4:15 pmOttawa
20h 25m
1 stop
SEA9:40 amSeattle/Tacoma Intl
$365
WestJet
Oct 14
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
Oct 18
YOW12:25 pmOttawa
9h 20m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
$380

American Airlines flights from Seattle to Ottawa

Our best American Airlines deals on Seattle to Ottawa flight tickets
American Airlines
Aug 14
SEA5:00 amSeattle/Tacoma Intl
12h 40m
2 stops
YOW8:40 pmOttawa
Aug 22
YOW7:00 amOttawa
15h 57m
3 stops
SEA7:57 pmSeattle/Tacoma Intl
$1,357
American Airlines
Aug 21
SEA9:42 pmSeattle/Tacoma Intl
19h 28m
3 stops
YOW8:10 pmOttawa
Aug 23
YOW7:00 amOttawa
16h 04m
3 stops
SEA8:04 pmSeattle/Tacoma Intl
$1,367
American Airlines
Aug 14
SEA11:56 pmSeattle/Tacoma Intl
17h 14m
3 stops
YOW8:10 pmOttawa
Aug 22
YOW8:40 amOttawa
15h 12m
2 stops
SEA8:52 pmSeattle/Tacoma Intl
$1,440

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Ottawa 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 832,500 searches. Data last updated August 9, 2026.
Use the filters below to find and compare flights from Seattle to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Thu 9/24

7:35 pm-5:35 am

1 stop7h 00m

Ottawa

Wed 9/30

1:20 pm-6:45 pm

1 stop8h 25m

$363

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Wed 9/16

7:35 pm-5:35 am

1 stop7h 00m

Ottawa

Wed 9/23

4:15 pm-9:40 am

1 stop20h 25m

$365

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Wed 10/14

7:35 pm-5:35 am

1 stop7h 00m

Ottawa

Sun 10/18

12:25 pm-6:45 pm

2 stops9h 20m

$380

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Wed 9/9

9:45 pm-5:35 am

2 stops28h 50m

Ottawa

Sat 9/12

1:20 pm-6:45 pm

1 stop8h 25m

$422

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Thu 9/24

7:35 pm-5:35 am

1 stop7h 00m

Ottawa

Sun 9/27

2:00 pm-9:40 am

2 stops22h 40m

$446

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Tue 9/15

10:30 am-12:25 am

2 stops10h 55m

Ottawa

Wed 9/30

6:55 am-6:45 pm

2 stops14h 50m

$448

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Sat 10/24

5:40 am-4:23 pm

1 stop7h 43m

Ottawa

Sat 10/31

2:00 pm-8:59 pm

1 stop9h 59m

$550

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Sat 10/24

5:40 am-5:15 pm

2 stops8h 35m

Ottawa

Sat 10/31

7:50 am-6:22 pm

2 stops13h 32m

$663

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Wed 9/9

8:10 am-11:54 pm

1 stop12h 44m

Ottawa

Fri 9/18

6:25 am-11:32 am

1 stop8h 07m

$672

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Sun 9/20

5:00 am-11:54 pm

2 stops15h 54m

Ottawa

Sun 9/27

6:00 am-10:56 pm

3 stops19h 56m

$693

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 Ottawa from

How to get the cheapest flight ticket from Seattle to Ottawa

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 Seattle and Ottawa?

Prices are currently low for flights on this route.

Typical prices usually range from $571 to $839.
The lowest price recently found on this route was $363.

What is the cheapest month to fly to Ottawa?

In general, March is the cheapest month to fly from Seattle to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of April is another great option to travel to Ottawa, with average flight prices from Seattle averaging around $354.

Can stopping save me money on Seattle to Ottawa flights?

You could potentially save up to 56% on your flight if you consider stops on a Seattle to Ottawa flight.

How have Seattle to Ottawa flight prices changed over time?

When to book flights from Seattle to Ottawa

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Ottawa according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Ottawa (SEA to YOW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Ottawa

Fastest flight time

7h 00m

Direct flights

None
The fastest flight from Seattle to Ottawa takes 7h 00m
There are no direct flights from Seattle to Ottawa. There are no popular flight routes from Seattle to Ottawa.
Search flight deals

Frequently asked questions about flying from Seattle to Ottawa

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

    Seattle/Tacoma Intl and Ottawa are 2187.8 mi apart from one another. 7h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Ottawa Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Ottawa Airport are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Ottawa Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Ottawa Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Ottawa Airport.

  • What documentation or ID do you need to fly to Ottawa Airport?

    The required travel and health documents for your Ottawa Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ottawa Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Seattle to Ottawa?

Best airlines flying from Seattle to Ottawa

Compare and see reviews for airlines that fly from Seattle to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $266Free CancellationRating
7.2
3,429 reviews
Search WestJet flights
Air CanadaPriceFrom $354Free CancellationRating
7.1
11,455 reviews
Search Air Canada flights
United AirlinesPriceFrom $362Free CancellationRating
7.4
10,090 reviews
Search United Airlines flights

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Brockville
Pembroke
Petawawa
Perth
Calabogie
Smiths Falls
Prescott
Wakefield

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Ottawa?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Ottawa for you.

Can I find flights from Seattle to Ottawa with flexible booking policies on momondo?

Flights from Seattle to Ottawa with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Ottawa?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Ottawa.

I’m not ready to book a flight from Seattle to Ottawa right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Ottawa now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ottawa and let you know when they change.

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