Cheap flights from Ottawa to Seattle from $172

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Seattle departing on 9/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

WestJet Logo
6:00 am - 12:59 pmYOW-SEA
9h 59m1 stop
WestJet Logo
2:05 pm - 12:40 amSEA-YOW
7h 35m1 stop
$279WestJet
Find Deal
Sat, Sep 6 - Tue, Sep 16
WestJet Logo
5:55 am - 12:59 pmYOW-SEA
10h 04m2 stops
WestJet Logo
1:50 pm - 12:40 amSEA-YOW
7h 50m1 stop
$285WestJet
Find Deal
Fri, Sep 5 - Sat, Sep 13
Air Canada Logo
5:15 pm - 10:06 pmYOW-SEA
7h 51m1 stop
Air Canada Logo
5:50 am - 3:46 pmSEA-YOW
6h 56m1 stop
$300Air Canada
Find Deal
Mon, Nov 3 - Sat, Nov 15
WestJet Logo
3:45 pm - 8:29 pmYOW-SEA
7h 44m1 stop
WestJet Logo
7:05 am - 6:20 pmSEA-YOW
8h 15m1 stop
$301WestJet
Find Deal
Wed, Sep 24 - Sat, Oct 11
Air Canada Logo
5:15 pm - 10:06 pmYOW-SEA
7h 51m1 stop
Air Canada Logo
10:05 am - 12:25 amSEA-YOW
11h 20m2 stops
$305Air Canada
Find Deal
Mon, Nov 3 - Fri, Nov 14
WestJet Logo
6:00 am - 12:58 pmYOW-SEA
9h 58m1 stop
WestJet Logo
8:40 am - 12:22 amSEA-YOW
12h 42m2 stops
$306WestJet
Find Deal
Wed, Aug 27 - Wed, Sep 3
WestJet Logo
3:45 pm - 8:28 pmYOW-SEA
7h 43m1 stop
WestJet Logo
1:50 pm - 12:40 amSEA-YOW
7h 50m1 stop
$307WestJet
Find Deal
Wed, Aug 27 - Wed, Sep 3
Air Canada Logo
6:00 pm - 10:16 pmYOW-SEA
7h 16m1 stop
Air Canada Logo
10:00 am - 8:53 pmSEA-YOW
7h 53m1 stop
$310Air Canada
Find Deal
Sat, Sep 6 - Sat, Sep 13
Air Canada Logo
5:15 pm - 10:06 pmYOW-SEA
7h 51m1 stop
Air Canada Logo
10:05 am - 11:08 pmSEA-YOW
10h 03m2 stops
$312Air Canada
Find Deal
Sat, Nov 8 - Mon, Nov 17
 Logo
6:10 am - 12:58 pmYOW-SEA
9h 48m2 stops
 Logo
5:30 am - 4:12 pmSEA-YOW
7h 42m1 stop
Fri, Aug 29 - Fri, Sep 5

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
Sep 6
YOW6:00 amOttawa
9h 59m
1 stop
SEA12:59 pmSeattle/Tacoma Intl
Sep 16
SEA2:05 pmSeattle/Tacoma Intl
7h 35m
1 stop
YOW12:40 amOttawa
WestJet
Sep 5
YOW5:55 amOttawa
10h 04m
2 stops
SEA12:59 pmSeattle/Tacoma Intl
Sep 13
SEA1:50 pmSeattle/Tacoma Intl
7h 50m
1 stop
YOW12:40 amOttawa
WestJet
Sep 24
YOW3:45 pmOttawa
7h 44m
1 stop
SEA8:29 pmSeattle/Tacoma Intl
Oct 11
SEA7:05 amSeattle/Tacoma Intl
8h 15m
1 stop
YOW6:20 pmOttawa

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
Nov 3
YOW5:15 pmOttawa
7h 51m
1 stop
SEA10:06 pmSeattle/Tacoma Intl
Nov 15
SEA5:50 amSeattle/Tacoma Intl
6h 56m
1 stop
YOW3:46 pmOttawa
Air Canada
Nov 3
YOW5:15 pmOttawa
7h 51m
1 stop
SEA10:06 pmSeattle/Tacoma Intl
Nov 14
SEA10:05 amSeattle/Tacoma Intl
11h 20m
2 stops
YOW12:25 amOttawa
Air Canada
Sep 6
YOW6:00 pmOttawa
7h 16m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
Sep 13
SEA10:00 amSeattle/Tacoma Intl
7h 53m
1 stop
YOW8:53 pmOttawa

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 cheapest month to fly to Seattle?

In general, March 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 $387. If you don’t want to visit Seattle in March, then you should wait until August to fly from Ottawa, when ticket prices are also cheap, with an average price of $394.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Ottawa is on a Saturday. momondo users have found tickets for Saturday departures for as low as $422. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Ottawa because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $577.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Ottawa in the evening is the least expensive time of day to depart. momondo users have found prices as low as $433 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $597. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $426 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 26% 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 July 2025, prices for Ottawa to Seattle flights are approximately 36% 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

$172

Fastest flight time

7h 16m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Ottawa in the past 72 hours is $172. The best round-trip flight deal from Ottawa to Seattle found on momondo in the last 72 hours is $279.
The fastest flight from Ottawa to Seattle takes 7h 16m
There are no direct flights from Ottawa to Seattle. Popular non-direct route for this connection is Ottawa Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

  • 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 7h 16m, 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
WestJetPriceFrom $277Free CancellationRating
7.2
2,942 reviews
Search WestJet flights
United AirlinesPriceFrom $323Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights
Air CanadaPriceFrom $328Free CancellationRating
7.1
9,725 reviews
Search Air Canada flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Federal Way
Lynnwood
Puyallup
Marysville
Tukwila
Kirkland
Shoreline
Lakewood
Fife
Cle Elum
Centralia
Westport
Redmond

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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1 adult
Sun 7/20
Sun 7/27

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