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Cheap flights from Ottawa to Seattle from $156

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 4/19. 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

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Find the cheapest flights from Ottawa to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
$281WestJet
Sun, Apr 19 - Sun, Apr 26
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:20 pm - 12:30 pm
SEA
-
YOW
18h 10m
2 stops
$283WestJet
Mon, Apr 20 - Sat, Apr 25
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:20 pm - 5:15 pm
SEA
-
YOW
22h 55m
1 stop
$288WestJet
Mon, Apr 20 - Sat, Apr 25
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
$298WestJet
Fri, May 8 - Wed, May 27
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
$299WestJet
Sat, May 16 - Sat, May 30
WestJet Logo
6:00 am - 2:19 pm
YOW
-
SEA
11h 19m
1 stop
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
$305WestJet
Sun, Apr 19 - Sun, Apr 26
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
WestJet Logo
7:00 am - 5:15 pm
SEA
-
YOW
7h 15m
1 stop
$307WestJet
Fri, May 1 - Thu, Jun 25
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
$308WestJet
Tue, Apr 21 - Tue, Apr 28
WestJet Logo
6:00 am - 2:19 pm
YOW
-
SEA
11h 19m
1 stop
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
$310WestJet
Tue, Apr 21 - Tue, Apr 28
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
7:35 pm - 12:20 am
SEA
-
YOW
25h 45m
2 stops
$312WestJet
Sun, Apr 19 - Sun, Apr 26

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
Apr 8
YOW4:15 pmOttawa
8h 38m
1 stop
SEA9:53 pmSeattle/Tacoma Intl
Apr 15
SEA8:00 pmSeattle/Tacoma Intl
7h 45m
1 stop
YOW6:45 amOttawa
$363
Air Canada
Apr 6
YOW4:15 pmOttawa
8h 38m
1 stop
SEA9:53 pmSeattle/Tacoma Intl
Apr 13
SEA8:00 pmSeattle/Tacoma Intl
7h 45m
1 stop
YOW6:45 amOttawa
$372
Air Canada
Apr 8
YOW4:15 pmOttawa
8h 38m
1 stop
SEA9:53 pmSeattle/Tacoma Intl
Apr 15
SEA5:40 amSeattle/Tacoma Intl
10h 56m
2 stops
YOW7:36 pmOttawa
$376

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Apr 19
YOW5:40 amOttawa
11h 39m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Apr 26
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
$281
WestJet
Apr 20
YOW5:40 amOttawa
11h 39m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Apr 25
SEA3:20 pmSeattle/Tacoma Intl
18h 10m
2 stops
YOW12:30 pmOttawa
$283
WestJet
Apr 20
YOW5:40 amOttawa
11h 39m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Apr 25
SEA3:20 pmSeattle/Tacoma Intl
22h 55m
1 stop
YOW5:15 pmOttawa
$288

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 832,500 searches. Data last updated March 10, 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

Sun 4/19

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Sun 4/26

7:35 pm-5:35 am

1 stop7h 00m

$281

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 4/20

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Sat 4/25

3:20 pm-12:30 pm

2 stops18h 10m

$283

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 4/20

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Sat 4/25

3:20 pm-5:15 pm

1 stop22h 55m

$288
Quickest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/8

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Wed 5/27

7:35 pm-5:35 am

1 stop7h 00m

$298

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 5/16

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sat 5/30

7:35 pm-5:35 am

1 stop7h 00m

$299

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 4/19

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

Sun 4/26

7:35 pm-5:35 am

1 stop7h 00m

$305

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/1

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Thu 6/25

7:00 am-5:15 pm

1 stop7h 15m

$307

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 4/21

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/28

7:35 pm-5:35 am

1 stop7h 00m

$308

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 4/21

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

Tue 4/28

7:35 pm-5:35 am

1 stop7h 00m

$310

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 4/19

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Sun 4/26

7:35 pm-12:20 am

2 stops25h 45m

$312

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 cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Ottawa to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $285. If you don’t want to visit Seattle in January, then you should wait until September to fly from Ottawa, when ticket prices are also cheap, with an average price of $337.

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 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $404 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 $302 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 47% 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 March 2026, prices for Ottawa to Seattle flights are approximately 62% 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

Fastest flight time

8h 17m

Direct flights

None
The fastest flight from Ottawa to Seattle takes 8h 17m
There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.
Search flight deals

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

    The distance between Ottawa and Seattle/Tacoma Intl is about 2187.8 mi. Flights usually cover this in 8h 17m, depending on flying conditions and air traffic around both airports.

  • 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 for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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 $275Free CancellationRating
7.4
9,409 reviews
Search United Airlines flights
WestJetPriceFrom $277Free CancellationRating
7.2
3,288 reviews
Search WestJet flights
Air CanadaPriceFrom $304Free CancellationRating
7.1
10,800 reviews
Search Air Canada flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Redmond
Marysville
Puyallup
Cle Elum
Lakewood
Tukwila
Federal Way
Fife
Westport
Centralia
Kirkland
Tumwater

Why use momondo?

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

It is quick and easy to find Ottawa to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

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

momondo does allow users to show only those flights to Seattle from Ottawa which offer a flexible booking policy as well as other useful filters and features.

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

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 Ottawa to Seattle.

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

Price alerts on flights to Seattle from Ottawa are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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