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$187+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Ottawa to Seattle/Tacoma Intl are usually found in August or March, booked 32 days in advance, depart on a Saturday or Thursday and return on a Thursday

Cheap 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 June 12, 2025.

Round-trip from

$296
(oojo)

One-way from

$187
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$434
From Ottawa to Seattle/Tacoma Intl
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One-way flight from Ottawa to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 9% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 June 12, 2025.

This oojo deal was found by Cheapflights users on 6/10. 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.
Thu 9/43:45 pmYOW - SEA
1 stop7h 44mWestJet
Sun 9/142:05 pmSEA - YOW
1 stop7h 35mWestJet
Deal found 6/10$296
This Booking.com deal was found by Cheapflights users on 6/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/112:25 pmYOW - SEA
1 stop9h 16mAir Canada
Mon 8/185:30 amSEA - YOW
2 stops11h 26mAir Canada
Deal found 6/9$326
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Fri 7/116:10 amYOW - SEA
2 stops17h 18mMultiple Airlines
Fri 7/181:15 pmSEA - YOW
1 stop20h 50mMultiple Airlines
Deal found 6/11$408
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 8/236:33 amYOW - SEA
2 stops12h 19mUnited Airlines
Mon 9/297:04 pmSEA - YOW
2 stops11h 07mUnited Airlines
Deal found 6/11$409
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/163:45 pmYOW - SEA
1 stop7h 43mDelta
Tue 7/222:05 pmSEA - YOW
1 stop7h 36mDelta
Deal found 6/12$1,067
This Lufthansa deal was found by Cheapflights users on 6/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/216:40 pmYOW - SEA
2 stops44h 15mLufthansa
Sun 9/282:20 pmSEA - YOW
2 stops23h 54mLufthansa
Deal found 6/11$11,852

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 June 12, 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

Thu 9/4

3:45 pm-8:29 pm

1 stop7h 44m

Seattle/Tacoma Intl

Sun 9/14

2:05 pm-12:40 am

1 stop7h 35m

$296

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 8/11

2:25 pm-8:41 pm

1 stop9h 16m

Seattle/Tacoma Intl

Mon 8/18

5:30 am-7:56 pm

2 stops11h 26m

$326

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 7/11

6:10 am-8:28 pm

2 stops17h 18m

Seattle/Tacoma Intl

Fri 7/18

1:15 pm-1:05 pm

1 stop20h 50m

$408

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 8/23

6:33 am-3:34 pm

1 stop12h 01m

Seattle/Tacoma Intl

Sat 9/27

5:00 am-9:35 pm

2 stops13h 35m

$409

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 7/16

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

Tue 7/22

2:05 pm-12:41 am

1 stop7h 36m

$1,067

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 8/21

6:40 pm-11:55 am

2 stops44h 15m

Seattle/Tacoma Intl

Sun 9/28

2:20 pm-5:14 pm

2 stops23h 54m

$11,852

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Fri 8/29

6:10 am-12:31 pm

1 stop9h 21m

$187

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 8/11

2:25 pm-8:41 pm

1 stop9h 16m

$198

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Mon 8/11

3:35 pm-4:25 pm

2 stops27h 50m

$206

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 7/26

7:29 pm-12:56 am

1 stop8h 27m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 9, 2025.

The best time to book flights from Ottawa to Seattle is 32 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 $238). Flying from Ottawa to Seattle in July is currently the most expensive (average of $391). 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 June 12, 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 28% on airfare.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 June 12, 2025.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Lufthansa
6.8
Okay
7,139 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Flying on WestJet is currently your cheapest option to Seattle, with prices starting at $296. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at $326 and $409, respectively. WestJet is currently priced 30% below the average price you’ll pay for this route.

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

    $187 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 $198 and $240, 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 $238). Flying from Ottawa to Seattle in July is currently the most expensive (average of $391). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$277Average$377FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$323Average$444FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$328Average$443FlexibilityNo cancel feeOn-time67%

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