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Cheap flights from Ottawa to Seattle from $154

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ottawa to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
12:25 pm - 9:00 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
11h 35m2 stops Winnipeg Calgary
WestJet Logo
7:00 am - 5:15 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 15m1 stop Calgary
$256WestJet
Fri, Sep 4 - Tue, Sep 8
WestJet Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
$261WestJet
Sat, Sep 12 - Wed, Sep 16
WestJet Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
$284WestJet
Sat, Sep 5 - Fri, Sep 11
Multiple Airlines Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Multiple Airlines Logo
7:35 pm - 2:55 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
16h 20m2 stops Calgary Toronto Pearson Intl
$372Multiple Airlines
Sat, Sep 12 - Sun, Sep 13
Multiple Airlines Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Multiple Airlines Logo
8:10 pm - 7:20 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
20h 10m1 stop Calgary
$413Multiple Airlines
Sat, Sep 12 - Sun, Sep 13
Multiple Airlines Logo
6:55 am - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
14h 50m2 stops Toronto Pearson Intl Calgary
Multiple Airlines Logo
7:35 pm - 2:55 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
16h 20m2 stops Calgary Toronto Pearson Intl
$419Multiple Airlines
Sat, Sep 12 - Sun, Sep 13
United Airlines Logo
6:15 am - 6:59 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
15h 44m1 stop Chicago O'Hare Intl
United Airlines Logo
10:40 pm - 2:12 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
12h 32m1 stop Chicago O'Hare Intl
$493United Airlines
Fri, Jan 22 - Fri, Jan 29
United Airlines Logo
6:15 am - 6:59 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
15h 44m1 stop Chicago O'Hare Intl
United Airlines Logo
7:32 pm - 2:12 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
15h 40m2 stops San Francisco Chicago O'Hare Intl
$493United Airlines
Fri, Jan 22 - Fri, Jan 29
Air Canada Logo
5:00 am - 9:52 amYOW  Ottawa-SEA Seattle/Tacoma Intl
7h 52m1 stop Vancouver Intl
Air Canada Logo
7:20 pm - 5:43 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 23m1 stop Vancouver Intl
$1,062Air Canada
Sat, Oct 3 - Sat, Oct 17
Air Canada Logo
5:00 am - 9:52 amYOW  Ottawa-SEA Seattle/Tacoma Intl
7h 52m1 stop Vancouver Intl
Air Canada Logo
7:20 pm - 5:43 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 23m1 stop Vancouver Intl
$1,063Air Canada
Sun, Oct 4 - Mon, Oct 19

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Sep 4
YOW12:25 pmOttawa
11h 35m
2 stops
SEA9:00 pmSeattle/Tacoma Intl
Sep 8
SEA7:00 amSeattle/Tacoma Intl
7h 15m
1 stop
YOW5:15 pmOttawa
$256
WestJet
Sep 12
YOW1:20 pmOttawa
8h 25m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
Sep 16
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
$261
WestJet
Sep 5
YOW1:20 pmOttawa
8h 25m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
Sep 11
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
$284

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
Sep 1
YOW6:00 amOttawa
16h 07m
3 stops
SEA7:07 pmSeattle/Tacoma Intl
Sep 25
SEA11:14 pmSeattle/Tacoma Intl
7h 42m
1 stop
YOW9:56 amOttawa
$696
United Airlines
Aug 28
YOW6:25 amOttawa
8h 07m
1 stop
SEA11:32 amSeattle/Tacoma Intl
Sep 4
SEA11:04 pmSeattle/Tacoma Intl
16h 51m
1 stop
YOW6:55 pmOttawa
$863

momondo Fare Finder

 
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 Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 9/4

12:25 pm-9:00 pm

2 stops11h 35m

Seattle/Tacoma Intl

Tue 9/8

7:00 am-5:15 pm

1 stop7h 15m

$256

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 9/12

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Wed 9/16

7:35 pm-5:35 am

1 stop7h 00m

$261

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 9/5

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Fri 9/11

7:35 pm-5:35 am

1 stop7h 00m

$284

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 9/12

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sun 9/13

7:35 pm-2:55 pm

2 stops16h 20m

$372

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 9/12

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sun 9/13

8:10 pm-7:20 pm

1 stop20h 10m

$413

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 9/12

6:55 am-6:45 pm

2 stops14h 50m

Seattle/Tacoma Intl

Sun 9/13

7:35 pm-2:55 pm

2 stops16h 20m

$419

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 1/22

6:15 am-6:59 pm

1 stop15h 44m

Seattle/Tacoma Intl

Fri 1/29

10:40 pm-2:12 pm

1 stop12h 32m

$493

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 1/22

6:15 am-6:59 pm

1 stop15h 44m

Seattle/Tacoma Intl

Fri 1/29

7:32 pm-2:12 pm

2 stops15h 40m

$493
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 10/3

5:00 am-9:52 am

1 stop7h 52m

Seattle/Tacoma Intl

Sat 10/17

7:20 pm-5:43 am

1 stop7h 23m

$1,062

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 10/4

5:00 am-9:52 am

1 stop7h 52m

Seattle/Tacoma Intl

Mon 10/19

7:20 pm-5:43 am

1 stop7h 23m

$1,063

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?

Prices are currently low for flights on this route.

Typical prices usually range from $392 to $624.
The lowest price recently found on this route was $256.

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 from Ottawa 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 $439 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 1% 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 August 2026, prices for Ottawa to Seattle flights are approximately 3% 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

Best Price Found

$154

Fastest flight time

8h 07m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is $154. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is $256.
The fastest flight from Ottawa to Seattle takes 8h 07m
There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.
Search flight deals

Frequently asked questions about flying from Ottawa to Seattle

  • 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 07m, 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
10,102 reviews
Search United Airlines flights
Air CanadaPriceFrom $304Free CancellationRating
7.1
11,497 reviews
Search Air Canada flights
WestJetPriceFrom $336Free CancellationRating
7.2
3,430 reviews
Search WestJet 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
Kent
Olympia
Lynnwood
Redmond
Lakewood
Federal Way
Puyallup
Fife
Tukwila
Cle Elum
Marysville
Kirkland
Lacey
Shoreline
Centralia

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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