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$199+ Cheap flights from Ottawa (YOW) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
1 adult, Economy
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Cheap flight deals from Ottawa to Seattle

Cheapest flights from Ottawa to Seattle
Explore the most affordable flight options available from Ottawa to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.

This Mytrip deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:20 pm
YOW
-
SEA
1 stop8h 25m
WestJet
Mon 9/147:35 pm
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 7/19$354
This Gotogate deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/141:20 pm
YOW
-
SEA
1 stop8h 25m
WestJet
Mon 9/287:35 pm
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 7/20$357
This Mytrip deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:20 pm
YOW
-
SEA
1 stop8h 25m
WestJet
Sun 8/237:35 pm
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 7/19$359
This Mytrip deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:20 pm
YOW
-
SEA
1 stop8h 25m
WestJet
Sun 9/137:35 pm
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 7/20$361
This oojo deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/301:20 pm
YOW
-
SEA
1 stop8h 25m
WestJet
Sun 10/47:35 pm
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 7/19$363
This oojo deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:25 pm
YOW
-
SEA
2 stops9h 20m
WestJet
Sat 8/227:35 pm
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 7/18$368
This Gotogate deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:55 am
YOW
-
SEA
2 stops14h 50m
WestJet
Mon 9/147:35 pm
SEA
-
YOW
1 stop7h 00m
WestJet
Deal found 7/19$372

Find flight deals from Ottawa to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$354
(Mytrip)

One-way from

$199
(Kiwi.com)

Popular in

May

Cheapest in

January

Average price

$507
Provider with most accurate pricing for Ottawa-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ottawa-Seattle/Tacoma Intl flights.
Search Deals
From Ottawa to Seattle/Tacoma Intl
Search Deals
One-way flight from Ottawa to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 23, 2026.
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

Cheapest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 9/9

6:55 am-6:45 pm

2 stops14h 50m

Seattle/Tacoma Intl

Fri 9/11

7:35 pm-12:30 pm

2 stops13h 55m

$486
Quickest round-trip

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 9/1

6:05 pm-10:42 pm

1 stop7h 37m

Seattle/Tacoma Intl

Wed 9/2

5:50 am-4:26 pm

1 stop7h 36m

$504

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 8/18

2:35 pm-10:42 pm

2 stops11h 07m

Seattle/Tacoma Intl

Wed 9/2

8:40 am-10:35 pm

2 stops10h 55m

$505

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 10/23

6:25 am-8:37 pm

2 stops17h 12m

Seattle/Tacoma Intl

Mon 10/26

6:51 pm-1:11 pm

2 stops15h 20m

$505

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 8/18

6:00 am-7:07 pm

3 stops16h 07m

Seattle/Tacoma Intl

Wed 9/2

9:05 am-11:54 pm

2 stops11h 49m

$507
Cheapest one-way

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sun 9/13

12:25 pm-10:00 am

3 stops24h 35m

$208

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 8/17

5:00 am-10:05 am

1 stop8h 05m

$239

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Tue 9/15

1:20 pm-6:45 pm

1 stop8h 25m

$243

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 12/5

2:00 pm-8:59 pm

1 stop9h 59m

$243

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 12/5

5:40 am-1:20 pm

2 stops34h 40m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/18

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Compare providers for flights from Ottawa to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Seattle in July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ottawa-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ottawa to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to Seattle

How far ahead should I book a flight from Ottawa to Seattle?

The best time to book flights from Ottawa to Seattle is 31 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Ottawa to Seattle?

Currently, January is the cheapest month in which you can book a flight from Ottawa to Seattle (average of $285). Flying from Ottawa to Seattle in May is currently the most expensive (average of $572). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Ottawa to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 23, 2026.
Peruse reviews from past customers who have flown with United Airlines,WestJet, andAir Canada from Ottawa to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,027 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
10,027 reviews
United Airlines
7.4
Good
10,027 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,413 reviews
United Airlines
7.4
Good
10,027 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
11,375 reviews
United Airlines
7.4
Good
10,027 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ottawa to Seattle?

    There are many flights that can get you from Ottawa to Seattle in 7h 37m. Fly via WestJet, Air Canada, or United Airlines to get the fastest option. Ottawa and Seattle are separated by a distance of 2193 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Ottawa to Seattle round-trip?

    Flying on United Airlines is currently your cheapest option to Seattle, with prices starting at $275. Additional round-trip tickets that might be worth considering are offered by Air Canada and WestJet, with the lowest prices starting at $304 and $358, respectively. United Airlines is currently priced 36% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Ottawa to Seattle one-way?

    $155 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $185 and $198, respectively.

  • Can I find deals for flights from Ottawa to Seattle that include hotel bookings?

    Yes. In addition to deals on Ottawa to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Seattle.

  • Can I find deals for business class flights from Ottawa to Seattle?

    Yes. Cheapflights offers flight deals from Ottawa to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ottawa to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Ottawa to Seattle (average of $285). Flying from Ottawa to Seattle in May is currently the most expensive (average of $572). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Renton
Lacey
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Centralia
Puyallup
Kent
Ellensburg
Fife
Marysville
Ocean Shores
Lakewood
Lynnwood
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ottawa to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Seattle flights
Pierre Elliott Trudeau Intl to Portland flights
Pearson Intl to Portland flights
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Kingston to Seattle flights

Top 3 airlines flying from Ottawa to Seattle

Discover the top 3 airlines that operate flights from Ottawa to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$275Average$422FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$304Average$446FlexibilityNo cancel feeOn-time67%
WestJetCheapest$358Average$459FlexibilityNo cancel feeOn-time60%

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