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Cheap flights from Ottawa to Seattle from $164

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
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
$249WestJet
Tue, Oct 13 - Tue, Oct 20
WestJet Logo
6:55 am - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
14h 50m2 stops Toronto Pearson Intl Calgary
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
$258WestJet
Wed, Oct 14 - Thu, Oct 22
WestJet Logo
8:15 pm - 9:40 amYOW  Ottawa-SEA Seattle/Tacoma Intl
16h 25m1 stop Calgary
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
$268WestJet
Fri, Oct 16 - Fri, Oct 23
WestJet Logo
8:15 pm - 9:40 amYOW  Ottawa-SEA Seattle/Tacoma Intl
16h 25m1 stop Calgary
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
$272WestJet
Wed, Oct 14 - Thu, Oct 22
Multiple Airlines Logo
5:00 am - 10:05 amYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 05m1 stop Vancouver Intl
Multiple Airlines Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
$329Multiple Airlines
Mon, Oct 12 - Mon, Oct 19
Multiple Airlines Logo
5:00 am - 10:05 amYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 05m1 stop Vancouver Intl
Multiple Airlines Logo
10:30 am - 12:20 amSEA  Seattle/Tacoma Intl-YOW Ottawa
10h 50m2 stops Calgary Toronto Pearson Intl
$341Multiple Airlines
Mon, Oct 12 - Mon, Oct 19
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 - 11:11 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
11h 31m2 stops Vancouver Intl Calgary
$368Air Canada
Wed, Oct 28 - Wed, Nov 4
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 - 11:11 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
10h 01m2 stops Vancouver Intl Calgary
$372Air Canada
Wed, Oct 28 - Wed, Nov 4
Air Canada Logo
5:00 am - 10:05 amYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 05m1 stop Vancouver Intl
Air Canada Logo
7:15 pm - 9:19 amSEA  Seattle/Tacoma Intl-YOW Ottawa
11h 04m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl
$373Air Canada
Mon, Oct 12 - Mon, Oct 19
Multiple Airlines Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Multiple Airlines Logo
7:08 pm - 12:01 amSEA  Seattle/Tacoma Intl-YOW Ottawa
25h 53m2 stops Phoenix Sky Harbor Intl Calgary
$376Multiple Airlines
Thu, Oct 22 - Wed, Jan 6

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WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Oct 13
YOW1:20 pmOttawa
8h 25m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
Oct 20
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
$249
WestJet
Oct 14
YOW6:55 amOttawa
14h 50m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
Oct 22
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
$258
WestJet
Oct 16
YOW8:15 pmOttawa
16h 25m
1 stop
SEA9:40 amSeattle/Tacoma Intl
Oct 23
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
$268

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
Oct 28
YOW7:45 amOttawa
9h 52m
1 stop
SEA2:37 pmSeattle/Tacoma Intl
Nov 4
SEA8:40 amSeattle/Tacoma Intl
11h 31m
2 stops
YOW11:11 pmOttawa
$368
Air Canada
Oct 28
YOW7:50 amOttawa
13h 32m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
Nov 4
SEA10:10 amSeattle/Tacoma Intl
10h 01m
2 stops
YOW11:11 pmOttawa
$372
Air Canada
Oct 12
YOW5:00 amOttawa
8h 05m
1 stop
SEA10:05 amSeattle/Tacoma Intl
Oct 19
SEA7:15 pmSeattle/Tacoma Intl
11h 04m
2 stops
YOW9:19 amOttawa
$373

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

Tue 10/13

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Tue 10/20

7:35 pm-5:35 am

1 stop7h 00m

$249

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 10/14

6:55 am-6:45 pm

2 stops14h 50m

Seattle/Tacoma Intl

Thu 10/22

7:35 pm-5:35 am

1 stop7h 00m

$258

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 10/16

8:15 pm-9:40 am

1 stop16h 25m

Seattle/Tacoma Intl

Fri 10/23

7:35 pm-5:35 am

1 stop7h 00m

$268

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 10/14

8:15 pm-9:40 am

1 stop16h 25m

Seattle/Tacoma Intl

Thu 10/22

7:35 pm-5:35 am

1 stop7h 00m

$272
Quickest round-trip

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 10/12

5:00 am-10:05 am

1 stop8h 05m

Seattle/Tacoma Intl

Mon 10/19

7:35 pm-5:35 am

1 stop7h 00m

$329

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 10/12

5:00 am-10:05 am

1 stop8h 05m

Seattle/Tacoma Intl

Mon 10/19

10:30 am-12:20 am

2 stops10h 50m

$341

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 10/28

7:45 am-2:37 pm

1 stop9h 52m

Seattle/Tacoma Intl

Wed 11/4

8:40 am-11:11 pm

2 stops11h 31m

$368

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 10/28

7:50 am-6:22 pm

2 stops13h 32m

Seattle/Tacoma Intl

Wed 11/4

10:10 am-11:11 pm

2 stops10h 01m

$372

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 10/12

5:00 am-10:05 am

1 stop8h 05m

Seattle/Tacoma Intl

Mon 10/19

7:15 pm-9:19 am

2 stops11h 04m

$373

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 10/22

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Wed 1/6

7:08 pm-12:01 am

2 stops25h 53m

$376

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 $317 to $428.
The lowest price recently found on this route was $249.

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 $447 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 6% 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 September 2026, prices for Ottawa to Seattle flights are approximately 14% 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

$164

Fastest flight time

8h 05m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is $164. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is $249.
The fastest flight from Ottawa to Seattle takes 8h 05m
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 05m, 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
11,630 reviews
Search Air Canada flights
WestJetPriceFrom $336Free CancellationRating
7.2
3,443 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
Redmond
Lakewood
Federal Way
Fife
Puyallup
Tukwila
Lynnwood
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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