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Cheap flights from Ottawa to Seattle from $216

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.
Air Canada Logo
7:50 am - 6:22 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
13h 32m2 stops Calgary Vancouver Intl
Air Canada Logo
10:10 am - 12:26 amSEA  Seattle/Tacoma Intl-YOW Ottawa
11h 16m2 stops Vancouver Intl Calgary
$418Air Canada
Sun, Nov 22 - Tue, Dec 1
Air Canada Logo
7:50 am - 6:22 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
13h 32m2 stops Calgary Vancouver Intl
Air Canada Logo
7:45 am - 7:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
8h 45m1 stop Toronto Pearson Intl
$426Air Canada
Sun, Nov 22 - Tue, Dec 1
Air Canada Logo
2:00 pm - 8:59 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 59m1 stop Toronto Pearson Intl
Air Canada Logo
7:45 am - 7:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
8h 45m1 stop Toronto Pearson Intl
$433Air Canada
Sun, Nov 22 - Tue, Dec 1
United Airlines Logo
6:15 am - 8:47 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
17h 32m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
10:50 pm - 7:27 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
17h 37m1 stop Washington, D.C. Dulles Intl
$445United Airlines
Sat, Dec 12 - Thu, Dec 31
United Airlines Logo
6:15 am - 4:18 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
13h 03m1 stop Chicago O'Hare Intl
United Airlines Logo
11:44 pm - 2:09 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
11h 25m1 stop Chicago O'Hare Intl
$445United Airlines
Sat, Dec 12 - Mon, Jan 4
United Airlines Logo
4:36 pm - 9:46 amYOW  Ottawa-SEA Seattle/Tacoma Intl
20h 10m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
7:25 pm - 1:11 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
14h 46m2 stops San Francisco Newark
$445United Airlines
Sat, Dec 12 - Thu, Dec 31
Air Canada Logo
2:00 pm - 8:59 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 59m1 stop Toronto Pearson Intl
Air Canada Logo
8:40 am - 12:56 amSEA  Seattle/Tacoma Intl-YOW Ottawa
13h 16m1 stop Vancouver Intl
$471Air Canada
Thu, Dec 10 - Thu, Dec 31
WestJet Logo
5:30 am - 1:40 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
35h 10m2 stops Toronto Pearson Intl Calgary
WestJet Logo
2:30 pm - 2:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
21h 00m1 stop Calgary
$484WestJet
Sat, Dec 12 - Sun, Jan 3
WestJet Logo
6:10 am - 1:40 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
WestJet Logo
2:30 pm - 11:40 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
30h 10m2 stops Calgary Toronto Pearson Intl
$492WestJet
Thu, Dec 10 - Thu, Dec 31
WestJet Logo
6:10 am - 1:40 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
WestJet Logo
2:30 pm - 2:30 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
21h 00m1 stop Calgary
$502WestJet
Fri, Feb 19 - Wed, Feb 24

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Dec 12
YOW5:30 amOttawa
35h 10m
2 stops
SEA1:40 pmSeattle/Tacoma Intl
Jan 3
SEA2:30 pmSeattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 pmOttawa
$484
WestJet
Dec 10
YOW6:10 amOttawa
10h 30m
1 stop
SEA1:40 pmSeattle/Tacoma Intl
Dec 31
SEA2:30 pmSeattle/Tacoma Intl
30h 10m
2 stops
YOW11:40 pmOttawa
$492
WestJet
Feb 19
YOW6:10 amOttawa
10h 30m
1 stop
SEA1:40 pmSeattle/Tacoma Intl
Feb 24
SEA2:30 pmSeattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 pmOttawa
$502

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
Dec 12
YOW6:15 amOttawa
13h 03m
1 stop
SEA4:18 pmSeattle/Tacoma Intl
Dec 31
SEA7:00 amSeattle/Tacoma Intl
11h 23m
1 stop
YOW9:23 pmOttawa
$445
United Airlines
Dec 10
YOW4:36 pmOttawa
9h 07m
1 stop
SEA10:43 pmSeattle/Tacoma Intl
Dec 17
SEA5:34 pmSeattle/Tacoma Intl
24h 49m
2 stops
YOW9:23 pmOttawa
$512
United Airlines
Dec 12
YOW9:45 amOttawa
14h 36m
2 stops
SEA9:21 pmSeattle/Tacoma Intl
Jan 3
SEA7:10 pmSeattle/Tacoma Intl
23h 46m
2 stops
YOW9:56 pmOttawa
$536

momondo Fare Finder

 
Use the filters below to find and compare flights from Ottawa to Seattle that are best for you.

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Route

Depart

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Price

Cheapest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 11/22

7:50 am-6:22 pm

2 stops13h 32m

Seattle/Tacoma Intl

Tue 12/1

10:10 am-12:26 am

2 stops11h 16m

$418

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 11/22

7:50 am-6:22 pm

2 stops13h 32m

Seattle/Tacoma Intl

Tue 12/1

7:45 am-7:30 pm

1 stop8h 45m

$426
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 11/22

2:00 pm-8:59 pm

1 stop9h 59m

Seattle/Tacoma Intl

Tue 12/1

7:45 am-7:30 pm

1 stop8h 45m

$433

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/12

6:15 am-8:47 pm

2 stops17h 32m

Seattle/Tacoma Intl

Thu 12/31

10:50 pm-7:27 pm

1 stop17h 37m

$445

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/12

6:15 am-4:18 pm

1 stop13h 03m

Seattle/Tacoma Intl

Mon 1/4

11:44 pm-2:09 pm

1 stop11h 25m

$445

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/12

4:36 pm-9:46 am

2 stops20h 10m

Seattle/Tacoma Intl

Thu 12/31

7:25 pm-1:11 pm

2 stops14h 46m

$445

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 12/10

2:00 pm-8:59 pm

1 stop9h 59m

Seattle/Tacoma Intl

Thu 12/31

8:40 am-12:56 am

1 stop13h 16m

$471

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 12/12

5:30 am-1:40 pm

2 stops35h 10m

Seattle/Tacoma Intl

Sun 1/3

2:30 pm-2:30 pm

1 stop21h 00m

$484

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 12/10

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Thu 12/31

2:30 pm-11:40 pm

2 stops30h 10m

$492

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 2/19

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Wed 2/24

2:30 pm-2:30 pm

1 stop21h 00m

$502

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 $447 to $627.
The lowest price recently found on this route was $418.

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 February to fly from Ottawa, when ticket prices are also cheap, with an average price of $338.

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 $459 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 2% 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 October 2026, prices for Ottawa to Seattle flights are approximately 12% 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

Best Price Found

$216

Fastest flight time

10h 30m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is $216. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is $418.
The fastest flight from Ottawa to Seattle takes 10h 30m
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 10h 30m, 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
Air CanadaPriceFrom $329Free CancellationRating
7.1
11,833 reviews
Search Air Canada flights
WestJetPriceFrom $336Free CancellationRating
7.2
3,442 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
Olympia
Redmond
Kent
Federal Way
Lakewood
Fife
Lynnwood
Puyallup
Tukwila
Cle Elum
Marysville
Lacey
Kirkland
Centralia
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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