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Cheap flights from Ottawa to Seattle from $188

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 3/7. 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
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
3:45 pm - 8:28 pm
YOW
-
SEA
7h 43m
1 stop
WestJet Logo
7:05 am - 6:25 pm
SEA
-
YOW
8h 20m
1 stop
$222WestJet
Sat, May 30 - Sat, Jun 6
WestJet Logo
3:45 pm - 8:28 pm
YOW
-
SEA
7h 43m
1 stop
WestJet Logo
7:05 am - 5:28 am
SEA
-
YOW
19h 23m
2 stops
$255WestJet
Sat, May 30 - Sat, Jun 6
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:10 pm - 4:53 pm
SEA
-
YOW
22h 43m
1 stop
$257WestJet
Fri, Mar 6 - Wed, Mar 11
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:10 pm - 12:39 am
SEA
-
YOW
30h 29m
2 stops
$263WestJet
Fri, Mar 6 - Wed, Mar 11
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:10 pm - 4:53 pm
SEA
-
YOW
22h 43m
1 stop
$268WestJet
Wed, Apr 8 - Tue, Apr 14
WestJet Logo
5:40 am - 2:19 pm
YOW
-
SEA
11h 39m
2 stops
WestJet Logo
3:10 pm - 4:53 pm
SEA
-
YOW
22h 43m
1 stop
$269WestJet
Wed, Apr 8 - Tue, Apr 14
WestJet Logo
6:15 am - 8:28 pm
YOW
-
SEA
17h 13m
2 stops
WestJet Logo
7:05 am - 6:25 pm
SEA
-
YOW
8h 20m
1 stop
$270WestJet
Fri, May 15 - Sat, May 23
WestJet Logo
6:00 am - 8:28 pm
YOW
-
SEA
17h 28m
1 stop
WestJet Logo
7:05 am - 6:25 pm
SEA
-
YOW
8h 20m
1 stop
$271WestJet
Fri, May 15 - Sat, May 23
WestJet Logo
6:15 am - 8:28 pm
YOW
-
SEA
17h 13m
2 stops
WestJet Logo
7:05 am - 6:25 pm
SEA
-
YOW
8h 20m
1 stop
$272WestJet
Fri, May 15 - Sat, May 23
WestJet Logo
6:15 am - 8:28 pm
YOW
-
SEA
17h 13m
2 stops
WestJet Logo
7:05 am - 6:25 pm
SEA
-
YOW
8h 20m
1 stop
$273WestJet
Fri, May 15 - Sat, May 23

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
Apr 2
YOW2:40 pmOttawa
9h 13m
1 stop
SEA8:53 pmSeattle/Tacoma Intl
Apr 12
SEA11:59 pmSeattle/Tacoma Intl
11h 00m
1 stop
YOW1:59 pmOttawa
$321
United Airlines
Mar 3
YOW6:20 amOttawa
19h 23m
1 stop
SEA10:43 pmSeattle/Tacoma Intl
Mar 4
SEA10:55 amSeattle/Tacoma Intl
7h 23m
1 stop
YOW9:18 pmOttawa
$322
United Airlines
Feb 20
YOW5:48 pmOttawa
9h 03m
1 stop
SEA11:51 pmSeattle/Tacoma Intl
Feb 23
SEA8:17 amSeattle/Tacoma Intl
23h 09m
3 stops
YOW10:26 amOttawa
$337

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
May 20
YOW6:15 amOttawa
9h 53m
2 stops
SEA1:08 pmSeattle/Tacoma Intl
May 25
SEA7:05 amSeattle/Tacoma Intl
8h 20m
1 stop
YOW6:25 pmOttawa
$219
WestJet
May 20
YOW3:45 pmOttawa
7h 43m
1 stop
SEA8:28 pmSeattle/Tacoma Intl
May 25
SEA7:05 amSeattle/Tacoma Intl
8h 20m
1 stop
YOW6:25 pmOttawa
$221
WestJet
May 30
YOW3:45 pmOttawa
7h 43m
1 stop
SEA8:28 pmSeattle/Tacoma Intl
Jun 6
SEA7:05 amSeattle/Tacoma Intl
8h 20m
1 stop
YOW6:25 pmOttawa
$222

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 January 22, 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

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 5/30

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

Sat 6/6

7:05 am-6:25 pm

1 stop8h 20m

$222

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 5/30

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

Sat 6/6

7:05 am-5:28 am

2 stops19h 23m

$255

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 3/6

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Wed 3/11

3:10 pm-4:53 pm

1 stop22h 43m

$257

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 3/6

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Wed 3/11

3:10 pm-12:39 am

2 stops30h 29m

$263

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-4:53 pm

1 stop22h 43m

$268

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-4:53 pm

1 stop22h 43m

$269

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

6:15 am-8:28 pm

2 stops17h 13m

Seattle/Tacoma Intl

Sat 5/23

7:05 am-6:25 pm

1 stop8h 20m

$270

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Sat 5/23

7:05 am-6:25 pm

1 stop8h 20m

$271

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

6:15 am-8:28 pm

2 stops17h 13m

Seattle/Tacoma Intl

Sat 5/23

7:05 am-6:25 pm

1 stop8h 20m

$272

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

6:15 am-8:28 pm

2 stops17h 13m

Seattle/Tacoma Intl

Sat 5/23

7:05 am-6:25 pm

1 stop8h 20m

$273

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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?

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 $318. 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 $413 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 $309 on momondo.

Can stopping save me money on Ottawa to Seattle flights?

You could potentially save up to 30% 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 January 2026, prices for Ottawa to Seattle flights are approximately 17% 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

7h 43m

Direct flights

None
The fastest flight from Ottawa to Seattle takes 7h 43m
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 7h 43m, 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
9,192 reviews
Search United Airlines flights
WestJetPriceFrom $277Free CancellationRating
7.2
3,248 reviews
Search WestJet flights
Air CanadaPriceFrom $290Free CancellationRating
7.1
10,648 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
Marysville
Redmond
Puyallup
Cle Elum
Tukwila
Lakewood
Federal Way
Centralia
Westport
Kirkland
Fife
Shoreline

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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