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

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

What airlines fly to Ottawa?

Air Canada, United Airlines and WestJet are the top three most popular airlines that fly to Ottawa from Seattle according to our data. Air Canada is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Ottawa. Keep in mind that there are 5 different airlines that fly to Ottawa on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Ottawa Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Ottawa Airport are updated daily.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Ottawa Airport?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Ottawa Airport is 3 as of August 2025.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Ottawa Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Ottawa Airport.

What documentation or ID do you need to fly to Ottawa Airport?

The required travel and health documents for your Ottawa Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ottawa Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$132 Cheap Flights from Seattle to Ottawa in 2025

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Find the cheapest flights from Seattle to Ottawa

Round-trip

One-way

Cheap round-trip flights

7:05 am - 6:20 pmSEA-YOW

8h 15m1 stop

3:45 pm - 8:29 pmYOW-SEA

7h 44m1 stop

$331WestJet

Find Deal

Thu, Sep 4 - Wed, Sep 10

1:50 pm - 1:03 pmSEA-YOW

20h 13m2 stops

5:15 pm - 12:40 pmYOW-SEA

22h 25m1 stop

$336

Find Deal

Thu, Sep 4 - Wed, Sep 10

1:50 pm - 4:19 pmSEA-YOW

23h 29m2 stops

7:15 pm - 12:33 pmYOW-SEA

20h 18m2 stops

$345WestJet

Find Deal

Sat, Sep 13 - Sat, Sep 20

2:05 pm - 4:19 pmSEA-YOW

23h 14m2 stops

5:15 pm - 7:14 pmYOW-SEA

28h 59m2 stops

$349WestJet

Find Deal

Mon, Sep 15 - Mon, Sep 22

2:05 pm - 12:40 amSEA-YOW

7h 35m1 stop

5:55 am - 12:59 pmYOW-SEA

10h 04m2 stops

$350WestJet

Find Deal

Tue, Sep 23 - Tue, Sep 30

7:05 am - 6:20 pmSEA-YOW

8h 15m1 stop

7:15 pm - 12:33 pmYOW-SEA

20h 18m2 stops

$355WestJet

Find Deal

Sat, Sep 13 - Sat, Sep 20

2:05 pm - 12:40 amSEA-YOW

7h 35m1 stop

6:00 am - 12:59 pmYOW-SEA

9h 59m1 stop

$356WestJet

Find Deal

Tue, Sep 23 - Tue, Sep 30

7:05 am - 12:21 amSEA-YOW

14h 16m3 stops

6:30 pm - 12:59 pmYOW-SEA

21h 29m2 stops

$418

Find Deal

Mon, Sep 15 - Mon, Sep 22

12:20 am - 2:04 pmSEA-YOW

10h 44m1 stop

5:15 am - 11:00 amYOW-SEA

8h 45m1 stop

$826United Airlines

Find Deal

Sun, Aug 17 - Thu, Aug 28

12:20 am - 2:04 pmSEA-YOW

10h 44m1 stop

1:55 pm - 9:17 pmYOW-SEA

10h 22m2 stops

$841United Airlines

Find Deal

Sun, Aug 17 - Thu, Aug 28

WestJet flights from Seattle to Ottawa

Our best WestJet deals on Seattle to Ottawa flight tickets

WestJet

Sep 4

SEA7:05 amSeattle/Tacoma Intl

8h 15m

1 stop

YOW6:20 pmOttawa

Sep 10

YOW3:45 pmOttawa

7h 44m

1 stop

SEA8:29 pmSeattle/Tacoma Intl

$331

Find similar

WestJet

Sep 13

SEA1:50 pmSeattle/Tacoma Intl

23h 29m

2 stops

YOW4:19 pmOttawa

Sep 20

YOW7:15 pmOttawa

20h 18m

2 stops

SEA12:33 pmSeattle/Tacoma Intl

$345

Find similar

WestJet

Sep 15

SEA2:05 pmSeattle/Tacoma Intl

23h 14m

2 stops

YOW4:19 pmOttawa

Sep 22

YOW5:15 pmOttawa

28h 59m

2 stops

SEA7:14 pmSeattle/Tacoma Intl

$349

Find similar

United Airlines flights from Seattle to Ottawa

Our best United Airlines deals on Seattle to Ottawa flight tickets

United Airlines

Aug 17

SEA12:20 amSeattle/Tacoma Intl

10h 44m

1 stop

YOW2:04 pmOttawa

Aug 28

YOW5:15 amOttawa

8h 45m

1 stop

SEA11:00 amSeattle/Tacoma Intl

$826

Find similar

United Airlines

Aug 17

SEA12:20 amSeattle/Tacoma Intl

10h 44m

1 stop

YOW2:04 pmOttawa

Aug 28

YOW1:55 pmOttawa

10h 22m

2 stops

SEA9:17 pmSeattle/Tacoma Intl

$841

Find similar

United Airlines

Aug 13

SEA12:20 amSeattle/Tacoma Intl

13h 46m

1 stop

YOW5:06 pmOttawa

Aug 17

YOW6:33 amOttawa

20h 26m

1 stop

SEA11:59 pmSeattle/Tacoma Intl

$990

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 9/4

7:05 am-6:20 pm

1 stop8h 15m

Ottawa

Wed 9/10

3:45 pm-8:29 pm

1 stop7h 44m

$331

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 9/4

1:50 pm-1:03 pm

2 stops20h 13m

Ottawa

Wed 9/10

5:15 pm-12:40 pm

1 stop22h 25m

$336

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 9/13

1:50 pm-4:19 pm

2 stops23h 29m

Ottawa

Sat 9/20

7:15 pm-12:33 pm

2 stops20h 18m

$345

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 9/15

2:05 pm-4:19 pm

2 stops23h 14m

Ottawa

Mon 9/22

5:15 pm-7:14 pm

2 stops28h 59m

$349

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 9/23

2:05 pm-12:40 am

1 stop7h 35m

Ottawa

Tue 9/30

5:55 am-12:59 pm

2 stops10h 04m

$350

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 9/13

7:05 am-6:20 pm

1 stop8h 15m

Ottawa

Sat 9/20

7:15 pm-12:33 pm

2 stops20h 18m

$355

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 9/23

2:05 pm-12:40 am

1 stop7h 35m

Ottawa

Tue 9/30

6:00 am-12:59 pm

1 stop9h 59m

$356

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 9/15

7:05 am-12:21 am

3 stops14h 16m

Ottawa

Mon 9/22

6:30 pm-12:59 pm

2 stops21h 29m

$418

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 8/17

12:20 am-2:04 pm

1 stop10h 44m

Ottawa

Thu 8/28

5:15 am-11:00 am

1 stop8h 45m

$826

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 8/17

12:20 am-2:04 pm

1 stop10h 44m

Ottawa

Thu 8/28

1:55 pm-9:17 pm

2 stops10h 22m

$841

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 Seattle to Ottawa

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 Ottawa?

In general, September is the cheapest month to fly from Seattle to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $401. The month of November is another great option to travel to Ottawa, with average flight prices from Seattle averaging around $454.

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

The cheapest day to depart from Seattle to Ottawa is on a Thursday. Travelers who choose to depart for Ottawa on a Thursday will often find tickets for as low as $461. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Sunday is $627.

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

In the afternoon is the cheapest time of day to fly from Seattle to Ottawa when you can find flight prices for as low as $384. Flying to Ottawa in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $559 on average. Flights to Ottawa from Seattle in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Ottawa?

You are more likely to see cheaper flights to Ottawa from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around $530 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from Seattle for as low as $268 on momondo.

How have Seattle to Ottawa flight prices changed over time?

When to book flights from Seattle to Ottawa

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Ottawa according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Ottawa (SEA to YOW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Ottawa

Best Price Found	$132
Fastest flight time	6h 56m
Direct flights	None
Airports in Ottawa	1 airport

The best one-way flight to Ottawa from Seattle in the past 72 hours is $132. The best round-trip flight deal from Seattle to Ottawa found on momondo in the last 72 hours is $331.

The fastest flight from Seattle to Ottawa takes 6h 56m

There are no direct flights from Seattle to Ottawa. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Ottawa Airport.

There is 1 airport near Ottawa: Ottawa (YOW)

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How far is Seattle/Tacoma Intl to Ottawa by plane?
Seattle/Tacoma Intl and Ottawa are 2187.8 mi apart from one another. 7h 23m is a normal flight duration for this route.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Ottawa Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Ottawa Airport are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Ottawa Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Ottawa Airport is 3 as of August 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Ottawa Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Ottawa Airport.
What documentation or ID do you need to fly to Ottawa Airport?
The required travel and health documents for your Ottawa Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ottawa Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Seattle to Ottawa?
momondo data reveals that the most frequently booked airline on the route from Seattle to Ottawa is Air Canada, representing 65% of all bookings. The subsequent popular airlines are WestJet at 18% and United Airlines at 17%.

Best airlines flying from Seattle to Ottawa

Compare and see reviews for airlines that fly from Seattle to Ottawa with momondo

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $244	Free Cancellation	Rating 7.1 9,855 reviews	Search Air Canada flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 8,904 reviews	Search United Airlines flights
WestJet	PriceFrom $294	Free Cancellation	Rating 7.2 2,980 reviews	Search WestJet flights

Gatineau

Smiths Falls

Calabogie

Brockville

Prescott

Pembroke

Winchester

Wakefield

Petawawa

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Ottawa?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Ottawa for you.

Can I find flights from Seattle to Ottawa with flexible booking policies on momondo?

Flights from Seattle to Ottawa with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Ottawa?

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 Seattle to Ottawa.

I’m not ready to book a flight from Seattle to Ottawa right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Ottawa now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ottawa and let you know when they change.