What is the cheapest airline that flies from Ottawa to Seattle/Tacoma Intl?

WestJet, Air Canada, and Delta are the most popular carriers operating from Ottawa to Seattle/Tacoma Intl

What airlines fly to Seattle?

Air Canada, WestJet and United Airlines are the top three most popular airlines that fly to Seattle from Ottawa according to our data. Air Canada is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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?

As of July 2025, there are 3 operators available to choose from 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.

$172 Cheap Flights from Ottawa to Seattle in 2025

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Find the cheapest flights from Ottawa to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

6:00 am - 12:59 pmYOW-SEA

9h 59m1 stop

2:05 pm - 12:40 amSEA-YOW

7h 35m1 stop

$279WestJet

Find Deal

Sat, Sep 6 - Tue, Sep 16

5:55 am - 12:59 pmYOW-SEA

10h 04m2 stops

1:50 pm - 12:40 amSEA-YOW

7h 50m1 stop

$285WestJet

Find Deal

Fri, Sep 5 - Sat, Sep 13

5:15 pm - 10:06 pmYOW-SEA

7h 51m1 stop

5:50 am - 3:46 pmSEA-YOW

6h 56m1 stop

$300Air Canada

Find Deal

Mon, Nov 3 - Sat, Nov 15

3:45 pm - 8:29 pmYOW-SEA

7h 44m1 stop

7:05 am - 6:20 pmSEA-YOW

8h 15m1 stop

$301WestJet

Find Deal

Wed, Sep 24 - Sat, Oct 11

5:15 pm - 10:06 pmYOW-SEA

7h 51m1 stop

10:05 am - 12:25 amSEA-YOW

11h 20m2 stops

$305Air Canada

Find Deal

Mon, Nov 3 - Fri, Nov 14

6:00 am - 12:58 pmYOW-SEA

9h 58m1 stop

8:40 am - 12:22 amSEA-YOW

12h 42m2 stops

$306WestJet

Find Deal

Wed, Aug 27 - Wed, Sep 3

3:45 pm - 8:28 pmYOW-SEA

7h 43m1 stop

1:50 pm - 12:40 amSEA-YOW

7h 50m1 stop

$307WestJet

Find Deal

Wed, Aug 27 - Wed, Sep 3

6:00 pm - 10:16 pmYOW-SEA

7h 16m1 stop

10:00 am - 8:53 pmSEA-YOW

7h 53m1 stop

$310Air Canada

Find Deal

Sat, Sep 6 - Sat, Sep 13

5:15 pm - 10:06 pmYOW-SEA

7h 51m1 stop

10:05 am - 11:08 pmSEA-YOW

10h 03m2 stops

$312Air Canada

Find Deal

Sat, Nov 8 - Mon, Nov 17

6:10 am - 12:58 pmYOW-SEA

9h 48m2 stops

5:30 am - 4:12 pmSEA-YOW

7h 42m1 stop

$393

Find Deal

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

$279

Find similar

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

$285

Find similar

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

$301

Find similar

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

$300

Find similar

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

$305

Find similar

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

$310

Find similar

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

Prices

Airlines

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)

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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?
As of July 2025, there are 3 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from Ottawa to Seattle is WestJet, representing 40% of all bookings. The subsequent popular airlines are Air Canada at 38% and United Airlines at 22%.

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
WestJet	PriceFrom $277	Free Cancellation	Rating 7.2 2,942 reviews	Search WestJet flights
United Airlines	PriceFrom $323	Free Cancellation	Rating 7.4 8,861 reviews	Search United Airlines flights
Air Canada	PriceFrom $328	Free Cancellation	Rating 7.1 9,725 reviews	Search Air Canada flights

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.