Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ottawa to Seattle from $160

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
10:30 am - 12:20 amSEA  Seattle/Tacoma Intl-YOW Ottawa
10h 50m2 stops Calgary Toronto Pearson Intl
$290WestJet
Wed, Sep 30 - Wed, Oct 7
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
$296WestJet
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
$299WestJet
Wed, Oct 14 - Mon, Oct 19
WestJet Logo
4:15 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
29h 30m1 stop Calgary
WestJet Logo
7:35 pm - 5:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
$301WestJet
Sat, Oct 10 - Tue, Oct 20
Air Canada Logo
2:50 pm - 10:47 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
10h 57m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
Air Canada Logo
10:50 am - 1:35 amSEA  Seattle/Tacoma Intl-YOW Ottawa
11h 45m2 stops Vancouver Intl Toronto Pearson Intl
$359Air Canada
Fri, Oct 16 - Fri, Oct 23
Multiple Airlines Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Multiple Airlines Logo
8:10 pm - 5:58 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
18h 48m1 stop Calgary
$373Multiple Airlines
Tue, Sep 29 - Thu, Oct 1
Multiple Airlines Logo
1:20 pm - 6:45 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Multiple Airlines Logo
8:10 pm - 5:58 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
18h 48m1 stop Calgary
$373Multiple Airlines
Mon, Sep 28 - Thu, Oct 1
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
$377Air Canada
Thu, Nov 19 - Mon, Nov 23
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 - 5:58 amSEA  Seattle/Tacoma Intl-YOW Ottawa
7h 43m1 stop Vancouver Intl
$378Air Canada
Mon, Oct 12 - Fri, Oct 16
United Airlines Logo
6:25 am - 9:15 pmYOW  Ottawa-SEA Seattle/Tacoma Intl
17h 50m3 stops Chicago O'Hare Intl Houston George Bush Intcntl Denver Intl
United Airlines Logo
8:25 am - 11:54 pmSEA  Seattle/Tacoma Intl-YOW Ottawa
12h 29m1 stop Washington, D.C. Dulles Intl
$383United Airlines
Sat, Sep 26 - Wed, Sep 30

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Sep 30
YOW1:20 pmOttawa
8h 25m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
Oct 7
SEA10:30 amSeattle/Tacoma Intl
10h 50m
2 stops
YOW12:20 amOttawa
$290
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
$296
WestJet
Oct 14
YOW8:15 pmOttawa
16h 25m
1 stop
SEA9:40 amSeattle/Tacoma Intl
Oct 19
SEA7:35 pmSeattle/Tacoma Intl
7h 00m
1 stop
YOW5:35 amOttawa
$299

United Airlines flights from Ottawa to Seattle

Our best United Airlines deals on Ottawa to Seattle flight tickets
United Airlines
Sep 26
YOW6:25 amOttawa
17h 50m
3 stops
SEA9:15 pmSeattle/Tacoma Intl
Sep 30
SEA8:25 amSeattle/Tacoma Intl
12h 29m
1 stop
YOW11:54 pmOttawa
$383
United Airlines
Nov 19
YOW6:00 amOttawa
18h 39m
1 stop
SEA9:39 pmSeattle/Tacoma Intl
Nov 23
SEA10:56 pmSeattle/Tacoma Intl
12h 13m
1 stop
YOW2:09 pmOttawa
$391
United Airlines
Oct 24
YOW6:25 amOttawa
15h 27m
1 stop
SEA6:52 pmSeattle/Tacoma Intl
Oct 31
SEA10:56 pmSeattle/Tacoma Intl
13h 13m
1 stop
YOW3:09 pmOttawa
$393

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

Wed 9/30

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Wed 10/7

10:30 am-12:20 am

2 stops10h 50m

$290

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

$296

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Wed 10/14

8:15 pm-9:40 am

1 stop16h 25m

Seattle/Tacoma Intl

Mon 10/19

7:35 pm-5:35 am

1 stop7h 00m

$299

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 10/10

4:15 pm-6:45 pm

1 stop29h 30m

Seattle/Tacoma Intl

Tue 10/20

7:35 pm-5:35 am

1 stop7h 00m

$301

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Fri 10/16

2:50 pm-10:47 pm

2 stops10h 57m

Seattle/Tacoma Intl

Fri 10/23

10:50 am-1:35 am

2 stops11h 45m

$359

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Tue 9/29

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Thu 10/1

8:10 pm-5:58 pm

1 stop18h 48m

$373

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Mon 9/28

1:20 pm-6:45 pm

1 stop8h 25m

Seattle/Tacoma Intl

Thu 10/1

8:10 pm-5:58 pm

1 stop18h 48m

$373

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Thu 11/19

7:50 am-6:22 pm

2 stops13h 32m

Seattle/Tacoma Intl

Mon 11/23

10:10 am-11:11 pm

2 stops10h 01m

$377
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

Fri 10/16

7:15 pm-5:58 am

1 stop7h 43m

$378

OttawaSeattle

YOW Ottawa - SEA Seattle/Tacoma Intl

YOWSEA

Ottawa

Sat 9/26

6:25 am-9:15 pm

3 stops17h 50m

Seattle/Tacoma Intl

Wed 9/30

8:25 am-11:54 pm

1 stop12h 29m

$383

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $304 to $404.
The lowest price recently found on this route was $290.

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 $441 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 8% 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

$160

Fastest flight time

8h 25m

Direct flights

None
The best one-way flight to Seattle from Ottawa in the past 72 hours is $160. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is $290.
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

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 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
Air CanadaPriceFrom $290Free CancellationRating
7.1
11,586 reviews
Search Air Canada flights
WestJetPriceFrom $336Free CancellationRating
7.2
3,445 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
Tukwila
Puyallup
Lynnwood
Cle Elum
Marysville
Kirkland
Centralia
Lacey
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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 10/5
Mon 10/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States