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Cheap flights from Ottawa to Seattle from $221

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
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
$355WestJet
Wed, Jan 27 - Mon, Feb 15
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
$358WestJet
Sun, Nov 22 - Tue, Dec 1
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
$370WestJet
Sun, Nov 22 - Tue, Dec 1
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
$370WestJet
Thu, Nov 19 - Thu, Nov 26
Air Canada Logo
7:45 am - 2:37 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 52m1 stop Vancouver Intl
Air Canada Logo
7:45 am - 6:45 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
8h 00m1 stop Toronto Pearson Intl
$408Air Canada
Thu, Dec 3 - Tue, Dec 8
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 - 7:45 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
9h 00m1 stop Toronto Pearson Intl
$416Air Canada
Sat, Oct 31 - Tue, Nov 10
Air Canada Logo
7:45 am - 2:37 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
9h 52m1 stop Vancouver Intl
Air Canada Logo
8:40 am - 12:56 amSEA  Seattle/Tacoma Intl-YOW Ottawa
13h 16m1 stop Vancouver Intl
$423Air Canada
Thu, Nov 12 - Sun, Nov 22
United Airlines Logo
6:00 am - 10:27 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
19h 27m1 stop Newark
United Airlines Logo
4:04 pm - 9:16 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
26h 12m2 stops Denver Intl Chicago O'Hare Intl
$467United Airlines
Mon, Dec 7 - Fri, Dec 11
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
7:04 pm - 1:11 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
15h 07m2 stops Denver Intl Newark
$467United Airlines
Fri, Nov 13 - Sun, Nov 22
United Airlines Logo
4:46 pm - 9:40 amYOW  Ottawa-SEA Seattle/Tacoma Intl
19h 54m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
7:04 pm - 2:09 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
16h 05m2 stops Denver Intl Chicago O'Hare Intl
$467United Airlines
Fri, Nov 13 - Sun, Nov 22

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Jan 27
YOW6:10 amOttawa
10h 30m
1 stop
SEA1:40 pmSeattle/Tacoma Intl
Feb 15
SEA2:30 pmSeattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 pmOttawa
$355
WestJet
Nov 22
YOW6:10 amOttawa
10h 30m
1 stop
SEA1:40 pmSeattle/Tacoma Intl
Dec 1
SEA2:30 pmSeattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 pmOttawa
$358
WestJet
Nov 19
YOW6:10 amOttawa
10h 30m
1 stop
SEA1:40 pmSeattle/Tacoma Intl
Nov 26
SEA2:30 pmSeattle/Tacoma Intl
21h 00m
1 stop
YOW2:30 pmOttawa
$370

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
Dec 3
YOW7:45 amOttawa
9h 52m
1 stop
SEA2:37 pmSeattle/Tacoma Intl
Dec 8
SEA7:45 amSeattle/Tacoma Intl
8h 00m
1 stop
YOW6:45 pmOttawa
$408
Air Canada
Oct 31
YOW2:00 pmOttawa
9h 59m
1 stop
SEA8:59 pmSeattle/Tacoma Intl
Nov 10
SEA7:45 amSeattle/Tacoma Intl
9h 00m
1 stop
YOW7:45 pmOttawa
$416
Air Canada
Nov 12
YOW7:45 amOttawa
9h 52m
1 stop
SEA2:37 pmSeattle/Tacoma Intl
Nov 22
SEA8:40 amSeattle/Tacoma Intl
13h 16m
1 stop
YOW12:56 amOttawa
$423

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

Return

Price

Cheapest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 1/27

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Mon 2/15

2:30 pm-2:30 pm

1 stop21h 00m

$355

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 11/22

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Tue 12/1

2:30 pm-2:30 pm

1 stop21h 00m

$358

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sun 11/22

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Tue 12/1

2:30 pm-2:30 pm

1 stop21h 00m

$370

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 11/19

6:10 am-1:40 pm

1 stop10h 30m

Seattle/Tacoma Intl

Thu 11/26

2:30 pm-2:30 pm

1 stop21h 00m

$370
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 12/3

7:45 am-2:37 pm

1 stop9h 52m

Seattle/Tacoma Intl

Tue 12/8

7:45 am-6:45 pm

1 stop8h 00m

$408

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 10/31

2:00 pm-8:59 pm

1 stop9h 59m

Seattle/Tacoma Intl

Tue 11/10

7:45 am-7:45 pm

1 stop9h 00m

$416

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 11/12

7:45 am-2:37 pm

1 stop9h 52m

Seattle/Tacoma Intl

Sun 11/22

8:40 am-12:56 am

1 stop13h 16m

$423

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 12/7

6:00 am-10:27 pm

1 stop19h 27m

Seattle/Tacoma Intl

Fri 12/11

4:04 pm-9:16 pm

2 stops26h 12m

$467

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 11/13

6:15 am-8:47 pm

2 stops17h 32m

Seattle/Tacoma Intl

Sun 11/22

7:04 pm-1:11 pm

2 stops15h 07m

$467

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 11/13

4:46 pm-9:40 am

2 stops19h 54m

Seattle/Tacoma Intl

Sun 11/22

7:04 pm-2:09 pm

2 stops16h 05m

$467

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 typical for flights on this route.

Typical prices usually range from $289 to $461.
The lowest price recently found on this route was $355.

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 October to fly from Ottawa, when ticket prices are also cheap, with an average price of $333.

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 $442 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

$221

Fastest flight time

9h 31m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is $221. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is $355.
The fastest flight from Ottawa to Seattle takes 9h 31m
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 9h 31m, 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 $290Free CancellationRating
7.1
11,770 reviews
Search Air Canada flights
WestJetPriceFrom $336Free CancellationRating
7.2
3,446 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
Redmond
Olympia
Kent
Federal Way
Lakewood
Lynnwood
Puyallup
Tukwila
Fife
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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