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$152+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
ene. 3 — ene. 101
sáb. 1/3
sáb. 1/10
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ottawa to Seattle/Tacoma Intl are usually found in September or January, booked 90 days in advance, depart on a Saturday or Thursday and return on a Thursday

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 diciembre 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/229:45 amYOW - SEA
1 stop14h 12mUnited Airlines
vie. 1/211:39 pmSEA - YOW
1 stop16h 13mUnited Airlines
Deal found 12/3$551
This Air Canada deal was found by Cheapflights users on 12/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/225:50 pmYOW - SEA
1 stop7h 56mAir Canada
jue. 12/258:10 amSEA - YOW
1 stop8h 08mAir Canada
Deal found 12/3$647
This FlightHub deal was found by Cheapflights users on 12/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/226:00 amYOW - SEA
2 stops17h 46mWestJet
jue. 12/253:10 pmSEA - YOW
2 stops30h 32mWestJet
Deal found 12/3$653
This FlightHub deal was found by Cheapflights users on 12/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/225:40 amYOW - SEA
2 stops18h 06mWestJet
vie. 1/23:10 pmSEA - YOW
2 stops30h 32mWestJet
Deal found 12/3$671
This Kiwi.com deal was found by Cheapflights users on 12/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/56:00 amYOW - SEA
1 stop11h 20mWestJet
mar. 12/97:55 pmSEA - YOW
2 stops17h 58mWestJet
Deal found 12/4$901

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 diciembre 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$236
(FlightHub)

One-way from

$152
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$521
Provider with most accurate pricing for Ottawa-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Ottawa-Seattle/Tacoma Intl flights.
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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. 5% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 diciembre 4, 2025.
Use the filters below to find and compare flights from Ottawa to Seattle that are best for you.

Fly from

Ottawa

Fly to

Seattle

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

mié. 4/8

5:40 am-2:19 pm

2 stops11h 39m

Seattle/Tacoma Intl

mar. 4/14

3:10 pm-4:53 pm

1 stop22h 43m

$236

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

lun. 1/12

4:15 pm-10:16 pm

1 stop9h 01m

Seattle/Tacoma Intl

lun. 1/19

8:00 pm-6:43 am

1 stop7h 43m

$301

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

jue. 3/19

2:15 pm-8:56 pm

1 stop9h 41m

Seattle/Tacoma Intl

lun. 3/23

11:59 pm-1:32 pm

1 stop10h 33m

$309

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

mié. 4/22

10:00 am-8:52 pm

1 stop13h 52m

Seattle/Tacoma Intl

vie. 4/24

7:02 pm-9:11 am

2 stops11h 09m

$311

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

vie. 5/15

6:30 am-11:15 am

1 stop7h 45m

Seattle/Tacoma Intl

sáb. 5/23

7:45 pm-8:19 am

1 stop9h 34m

$312

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

lun. 1/12

7:15 pm-2:20 pm

2 stops22h 05m

Seattle/Tacoma Intl

lun. 1/19

3:10 pm-12:42 am

2 stops30h 32m

$340

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

mié. 4/22

7:15 am-9:51 pm

1 stop17h 36m

Seattle/Tacoma Intl

vie. 4/24

8:00 am-7:34 pm

1 stop8h 34m

$354

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

mar. 1/27

5:11 pm-3:44 pm

2 stops25h 33m

$183

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

mar. 1/27

4:15 pm-10:16 pm

1 stop9h 01m

$184

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

dom. 1/18

5:40 am-7:17 pm

1 stop16h 37m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 17 results
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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ottawa-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Seattle. Price data was last updated on November 28, 2025.

The best time to book flights from Ottawa to Seattle is 89 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 $182). Flying from Ottawa to Seattle in February is currently the most expensive (average of $358). 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.

What is the cheapest time of day to fly from YOW to SEA?

Find hourly flight availability from Ottawa to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 4, 2025.

One of the essential ways to save on airfare from Ottawa to Seattle is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 27% on airfare.

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 diciembre 4, 2025.
Peruse reviews from past customers who have flown with United Airlines, WestJet, and Air 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
9,066 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,066 reviews
United Airlines
7.4
Good
9,066 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
WestJet
7.2
Good
3,193 reviews
United Airlines
7.4
Good
9,066 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Air Canada
7.1
Good
10,500 reviews
United Airlines
7.4
Good
9,066 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 9h 01m. 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 WestJet and Air Canada, with the lowest prices starting at $277 and $290, respectively. United Airlines is currently priced 33% 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 United Airlines and Air Canada, with prices starting from $198 and $201, 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 $182). Flying from Ottawa to Seattle in February is currently the most expensive (average of $358). 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
Tacoma
SeaTac
Lakewood
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

Browse thousands of different options on Cheapflights for your next trip

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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 diciembre 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$275Average$424FlexibilityNo cancel feeOn-time69%
WestJetCheapest$277Average$480FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$290Average$488FlexibilityNo cancel feeOn-time67%

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