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Cheap flights from Ottawa to Seattle from $148

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 3/11. 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
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
$264WestJet
Thu, Apr 16 - Mon, Apr 20
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
Thu, Apr 16 - Mon, Apr 20
WestJet Logo
6:15 pm - 6:45 pm
YOW
-
SEA
27h 30m
2 stops
WestJet Logo
7:35 pm - 12:20 am
SEA
-
YOW
25h 45m
2 stops
$290WestJet
Wed, May 13 - Mon, May 18
WestJet Logo
6:00 am - 2:19 pm
YOW
-
SEA
11h 19m
1 stop
WestJet Logo
3:10 pm - 4:53 pm
SEA
-
YOW
22h 43m
1 stop
$292WestJet
Thu, Apr 16 - Mon, Apr 20
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
$294WestJet
Sat, Jun 13 - Mon, Jun 22
WestJet Logo
12:25 pm - 6:45 pm
YOW
-
SEA
9h 20m
2 stops
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
$296WestJet
Sat, Jun 13 - Mon, Jun 22
WestJet Logo
6:00 am - 2:19 pm
YOW
-
SEA
11h 19m
1 stop
WestJet Logo
3:10 pm - 4:53 pm
SEA
-
YOW
22h 43m
1 stop
$297WestJet
Thu, Apr 16 - Mon, Apr 20
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 15 - Sat, May 23
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
Fri, May 15 - Sat, May 23
WestJet Logo
6:00 am - 2:19 pm
YOW
-
SEA
11h 19m
1 stop
WestJet Logo
11:55 am - 12:40 am
SEA
-
YOW
9h 45m
2 stops
$300WestJet
Tue, Apr 7 - Fri, Apr 10

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Apr 16
YOW5:40 amOttawa
11h 39m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Apr 20
SEA3:10 pmSeattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 pmOttawa
$264
WestJet
Apr 16
YOW5:40 amOttawa
11h 39m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Apr 20
SEA3:10 pmSeattle/Tacoma Intl
22h 43m
1 stop
YOW4:53 pmOttawa
$268
WestJet
May 13
YOW6:15 pmOttawa
27h 30m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
May 18
SEA7:35 pmSeattle/Tacoma Intl
25h 45m
2 stops
YOW12:20 amOttawa
$290

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
Apr 30
YOW2:40 pmOttawa
9h 13m
1 stop
SEA8:53 pmSeattle/Tacoma Intl
Apr 30
SEA11:48 pmSeattle/Tacoma Intl
11h 11m
1 stop
YOW1:59 pmOttawa
$342
United Airlines
Apr 8
YOW5:20 pmOttawa
8h 17m
1 stop
SEA10:37 pmSeattle/Tacoma Intl
Apr 14
SEA8:55 amSeattle/Tacoma Intl
11h 59m
2 stops
YOW11:54 pmOttawa
$348
United Airlines
Apr 5
YOW10:44 amOttawa
14h 58m
1 stop
SEA10:42 pmSeattle/Tacoma Intl
Apr 8
SEA11:35 pmSeattle/Tacoma Intl
21h 19m
2 stops
YOW11:54 pmOttawa
$349

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 February 27, 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

Thu 4/16

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Mon 4/20

3:10 pm-4:53 pm

1 stop22h 43m

$264

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 4/16

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Mon 4/20

3:10 pm-4:53 pm

1 stop22h 43m

$268

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 5/13

6:15 pm-6:45 pm

2 stops27h 30m

Seattle/Tacoma Intl

Mon 5/18

7:35 pm-12:20 am

2 stops25h 45m

$290

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 4/16

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

Mon 4/20

3:10 pm-4:53 pm

1 stop22h 43m

$292

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 6/13

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Mon 6/22

7:35 pm-5:35 am

1 stop7h 00m

$294

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 6/13

12:25 pm-6:45 pm

2 stops9h 20m

Seattle/Tacoma Intl

Mon 6/22

7:35 pm-5:35 am

1 stop7h 00m

$296

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 4/16

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

Mon 4/20

3:10 pm-4:53 pm

1 stop22h 43m

$297

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sat 5/23

7:35 pm-5:35 am

1 stop7h 00m

$298

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 5/15

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sat 5/23

7:35 pm-5:35 am

1 stop7h 00m

$299

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 4/7

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

Fri 4/10

11:55 am-12:40 am

2 stops9h 45m

$300

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 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 $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 $399 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 31% 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 February 2026, prices for Ottawa to Seattle flights are approximately 6% 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

  • 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 25m, 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
9,363 reviews
Search United Airlines flights
WestJetPriceFrom $277Free CancellationRating
7.2
3,276 reviews
Search WestJet flights
Air CanadaPriceFrom $304Free CancellationRating
7.1
10,757 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
Lakewood
Tukwila
Federal Way
Fife
Westport
Kirkland
Centralia
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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