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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 1/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
3:45 pm - 8:28 pmYOW-SEA
7h 43m1 stop
WestJet Logo
7:05 am - 6:25 pmSEA-YOW
8h 20m1 stop
$196WestJet
Find Deal
vie., may. 15 - sáb., may. 23
WestJet Logo
3:45 pm - 8:28 pmYOW-SEA
7h 43m1 stop
WestJet Logo
7:05 am - 6:25 pmSEA-YOW
8h 20m1 stop
$197WestJet
Find Deal
vie., may. 15 - sáb., may. 23
WestJet Logo
6:15 am - 8:28 pmYOW-SEA
17h 13m2 stops
WestJet Logo
7:05 am - 6:25 pmSEA-YOW
8h 20m1 stop
$221WestJet
Find Deal
vie., may. 15 - sáb., may. 23
WestJet Logo
5:55 am - 8:28 pmYOW-SEA
17h 33m2 stops
WestJet Logo
7:05 am - 6:25 pmSEA-YOW
8h 20m1 stop
$224WestJet
Find Deal
vie., may. 15 - sáb., may. 23
WestJet Logo
5:55 am - 8:28 pmYOW-SEA
17h 33m2 stops
WestJet Logo
7:05 am - 6:25 pmSEA-YOW
8h 20m1 stop
$225WestJet
Find Deal
vie., may. 15 - sáb., may. 23
WestJet Logo
5:40 am - 2:19 pmYOW-SEA
11h 39m2 stops
WestJet Logo
3:10 pm - 12:39 amSEA-YOW
30h 29m2 stops
$242WestJet
Find Deal
jue., mar. 19 - lun., mar. 23
WestJet Logo
6:15 am - 8:28 pmYOW-SEA
17h 13m2 stops
WestJet Logo
7:05 am - 5:28 amSEA-YOW
19h 23m2 stops
$246WestJet
Find Deal
vie., may. 15 - sáb., may. 23
WestJet Logo
6:00 am - 2:19 pmYOW-SEA
11h 19m1 stop
WestJet Logo
3:10 pm - 12:39 amSEA-YOW
30h 29m2 stops
$263WestJet
Find Deal
jue., mar. 19 - lun., mar. 23
WestJet Logo
7:15 pm - 2:20 pmYOW-SEA
22h 05m2 stops
WestJet Logo
3:10 pm - 6:21 pmSEA-YOW
24h 11m2 stops
$285WestJet
Find Deal
lun., dic. 15 - jue., ene. 8
WestJet Logo
6:00 am - 2:20 pmYOW-SEA
11h 20m1 stop
WestJet Logo
3:10 pm - 6:21 pmSEA-YOW
24h 11m2 stops
$287WestJet
Find Deal
lun., dic. 15 - jue., ene. 8

WestJet flights from Ottawa to Seattle

Our best WestJet deals on Ottawa to Seattle flight tickets
WestJet
May 15
YOW3:45 pmOttawa
7h 43m
1 stop
SEA8:28 pmSeattle/Tacoma Intl
May 23
SEA7:05 amSeattle/Tacoma Intl
8h 20m
1 stop
YOW6:25 pmOttawa
$196
Find similar
WestJet
May 15
YOW3:45 pmOttawa
7h 43m
1 stop
SEA8:28 pmSeattle/Tacoma Intl
May 23
SEA7:05 amSeattle/Tacoma Intl
8h 20m
1 stop
YOW6:25 pmOttawa
$197
Find similar
WestJet
May 15
YOW6:15 amOttawa
17h 13m
2 stops
SEA8:28 pmSeattle/Tacoma Intl
May 23
SEA7:05 amSeattle/Tacoma Intl
8h 20m
1 stop
YOW6:25 pmOttawa
$221
Find similar

Air Canada flights from Ottawa to Seattle

Our best Air Canada deals on Ottawa to Seattle flight tickets
Air Canada
Jan 29
YOW5:45 amOttawa
11h 46m
2 stops
SEA2:31 pmSeattle/Tacoma Intl
Feb 2
SEA8:00 pmSeattle/Tacoma Intl
7h 43m
1 stop
YOW6:43 amOttawa
$305
Find similar
Air Canada
Jan 29
YOW5:45 amOttawa
11h 46m
2 stops
SEA2:31 pmSeattle/Tacoma Intl
Feb 2
SEA8:00 pmSeattle/Tacoma Intl
9h 18m
2 stops
YOW8:18 amOttawa
$312
Find similar
Air Canada
Dec 13
YOW4:15 pmOttawa
9h 01m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
Jan 8
SEA8:10 amSeattle/Tacoma Intl
7h 28m
1 stop
YOW6:38 pmOttawa
$331
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated noviembre 20, 2025.
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

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

vie. 5/15

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

sáb. 5/23

7:05 am-6:25 pm

1 stop8h 20m

$196

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

vie. 5/15

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

sáb. 5/23

7:05 am-6:25 pm

1 stop8h 20m

$197

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

vie. 5/15

6:15 am-8:28 pm

2 stops17h 13m

Seattle/Tacoma Intl

sáb. 5/23

7:05 am-6:25 pm

1 stop8h 20m

$221

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

vie. 5/15

5:55 am-8:28 pm

2 stops17h 33m

Seattle/Tacoma Intl

sáb. 5/23

7:05 am-6:25 pm

1 stop8h 20m

$224

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

vie. 5/15

5:55 am-8:28 pm

2 stops17h 33m

Seattle/Tacoma Intl

sáb. 5/23

7:05 am-6:25 pm

1 stop8h 20m

$225

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

jue. 3/19

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

lun. 3/23

3:10 pm-12:39 am

2 stops30h 29m

$242

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

vie. 5/15

6:15 am-8:28 pm

2 stops17h 13m

Seattle/Tacoma Intl

sáb. 5/23

7:05 am-5:28 am

2 stops19h 23m

$246

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

jue. 3/19

6:00 am-2:19 pm

1 stop11h 19m

Seattle/Tacoma Intl

lun. 3/23

3:10 pm-12:39 am

2 stops30h 29m

$263

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

lun. 12/15

7:15 pm-2:20 pm

2 stops22h 05m

Seattle/Tacoma Intl

jue. 1/8

3:10 pm-6:21 pm

2 stops24h 11m

$285

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

lun. 12/15

6:00 am-2:20 pm

1 stop11h 20m

Seattle/Tacoma Intl

jue. 1/8

3:10 pm-6:21 pm

2 stops24h 11m

$287

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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, 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 October to fly from Ottawa, when ticket prices are also cheap, with an average price of $386.

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 $420 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 November 2025, prices for Ottawa to Seattle flights are approximately 29% 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

Direct flights

None
There are no direct flights from Ottawa to Seattle. There are no popular flight routes from Ottawa to Seattle.
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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 43m, 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
United AirlinesPriceFrom $275Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
WestJetPriceFrom $277Free CancellationRating
7.2
3,169 reviews
Search WestJet flights
Air CanadaPriceFrom $290Free CancellationRating
7.1
10,463 reviews
Search Air Canada 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
Olympia
Lynnwood
Kent
Puyallup
Marysville
Redmond
Tukwila
Lakewood
Federal Way
Fife
Cle Elum
Centralia
Kirkland
Westport
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.

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