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 66% 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.

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

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

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 December 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.

$156 Cheap Flights from Ottawa to Seattle in 2025/26

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Find the cheapest flights from Ottawa to Seattle

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:40 am - 2:19 pm

YOW

SEA

11h 39m2 stops

3:10 pm - 4:53 pm

SEA

YOW

22h 43m1 stop

$247WestJet

Wed, Apr 8 - Tue, Apr 14

5:40 am - 2:19 pm

YOW

SEA

11h 39m2 stops

3:10 pm - 12:39 am

SEA

YOW

30h 29m2 stops

$251WestJet

Wed, Apr 8 - Tue, Apr 14

7:45 am - 2:31 pm

YOW

SEA

9h 46m1 stop

8:00 pm - 6:43 am

SEA

YOW

7h 43m1 stop

$255Air Canada

Thu, Jan 15 - Wed, Jan 21

5:40 am - 2:20 pm

YOW

SEA

11h 40m2 stops

3:10 pm - 12:42 am

SEA

YOW

30h 32m2 stops

$260WestJet

Thu, Jan 15 - Wed, Jan 21

7:45 am - 2:31 pm

YOW

SEA

9h 46m1 stop

8:00 pm - 9:23 am

SEA

YOW

10h 23m2 stops

$264Air Canada

Thu, Jan 15 - Wed, Jan 21

5:45 pm - 2:19 pm

YOW

SEA

23h 34m1 stop

3:10 pm - 12:39 am

SEA

YOW

30h 29m2 stops

$265WestJet

Thu, Apr 2 - Mon, Apr 6

5:40 am - 2:20 pm

YOW

SEA

11h 40m2 stops

3:10 pm - 12:39 am

SEA

YOW

30h 29m2 stops

$267WestJet

Wed, Jan 21 - Wed, Feb 11

5:45 pm - 2:19 pm

YOW

SEA

23h 34m1 stop

3:10 pm - 4:53 pm

SEA

YOW

22h 43m1 stop

$270WestJet

Wed, Apr 8 - Tue, Apr 14

7:45 am - 2:31 pm

YOW

SEA

9h 46m1 stop

8:00 pm - 6:43 am

SEA

YOW

7h 43m1 stop

$285Air Canada

Thu, Jan 15 - Mon, Jan 19

6:55 pm - 9:15 am

YOW

SEA

17h 20m2 stops

5:50 am - 3:45 pm

SEA

YOW

6h 55m1 stop

$286Air Canada

Thu, Feb 12 - Thu, Feb 19

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets

Air Canada

Jan 15

YOW7:45 amOttawa

9h 46m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

Jan 21

SEA8:00 pmSeattle/Tacoma Intl

7h 43m

1 stop

YOW6:43 amOttawa

$255

Find similar

Air Canada

Jan 15

YOW7:45 amOttawa

9h 46m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

Jan 21

SEA8:00 pmSeattle/Tacoma Intl

10h 23m

2 stops

YOW9:23 amOttawa

$264

Find similar

Air Canada

Jan 15

YOW7:45 amOttawa

9h 46m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

Jan 19

SEA8:00 pmSeattle/Tacoma Intl

7h 43m

1 stop

YOW6:43 amOttawa

$285

Find similar

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets

WestJet

Apr 8

YOW5:40 amOttawa

11h 39m

2 stops

SEA2:19 pmSeattle/Tacoma Intl

Apr 14

SEA3:10 pmSeattle/Tacoma Intl

22h 43m

1 stop

YOW4:53 pmOttawa

$247

Find similar

WestJet

Apr 8

YOW5:40 amOttawa

11h 39m

2 stops

SEA2:19 pmSeattle/Tacoma Intl

Apr 14

SEA3:10 pmSeattle/Tacoma Intl

30h 29m

2 stops

YOW12:39 amOttawa

$251

Find similar

WestJet

Jan 15

YOW5:40 amOttawa

11h 40m

2 stops

SEA2:20 pmSeattle/Tacoma Intl

Jan 21

SEA3:10 pmSeattle/Tacoma Intl

30h 32m

2 stops

YOW12:42 amOttawa

$260

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-4:53 pm

1 stop22h 43m

$247

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-12:39 am

2 stops30h 29m

$251

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 1/15

7:45 am-2:31 pm

1 stop9h 46m

Seattle/Tacoma Intl

Wed 1/21

8:00 pm-6:43 am

1 stop7h 43m

$255

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 1/15

5:40 am-2:20 pm

2 stops11h 40m

Seattle/Tacoma Intl

Wed 1/21

3:10 pm-12:42 am

2 stops30h 32m

$260

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 1/15

7:45 am-2:31 pm

1 stop9h 46m

Seattle/Tacoma Intl

Wed 1/21

8:00 pm-9:23 am

2 stops10h 23m

$264

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 4/2

5:45 pm-2:19 pm

1 stop23h 34m

Seattle/Tacoma Intl

Mon 4/6

3:10 pm-12:39 am

2 stops30h 29m

$265

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 1/21

5:40 am-2:20 pm

2 stops11h 40m

Seattle/Tacoma Intl

Wed 2/11

3:10 pm-12:39 am

2 stops30h 29m

$267

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 4/8

5:45 pm-2:19 pm

1 stop23h 34m

Seattle/Tacoma Intl

Tue 4/14

3:10 pm-4:53 pm

1 stop22h 43m

$270

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 1/15

7:45 am-2:31 pm

1 stop9h 46m

Seattle/Tacoma Intl

Mon 1/19

8:00 pm-6:43 am

1 stop7h 43m

$285

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 2/12

6:55 pm-9:15 am

2 stops17h 20m

Seattle/Tacoma Intl

Thu 2/19

5:50 am-3:45 pm

1 stop6h 55m

$286

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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, September 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 $340. If you don’t want to visit Seattle in September, then you should wait until January to fly from Ottawa, when ticket prices are also cheap, with an average price of $347.

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 $413 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 65% 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 December 2025, prices for Ottawa to Seattle flights are approximately 18% 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

Fastest flight time	16h 45m
Direct flights	None

The fastest flight from Ottawa to Seattle takes 16h 45m

There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.

Search flight deals

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 16h 45m, 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 December 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 Air Canada, representing 44% of all bookings. The subsequent popular airlines are WestJet at 37% and United Airlines at 20%.

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
United Airlines	PriceFrom $275	Free Cancellation	Rating 7.4 9,124 reviews	Search United Airlines flights
WestJet	PriceFrom $277	Free Cancellation	Rating 7.2 3,228 reviews	Search WestJet flights
Air Canada	PriceFrom $290	Free Cancellation	Rating 7.1 10,571 reviews	Search Air Canada flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Federal Way

Cle Elum

Lakewood

Centralia

Fife

Westport

Kirkland

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.