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$168+ Cheap flights from Seattle (SEA) to Ottawa (YOW)

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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Find cheap flights from Seattle to Ottawa with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Ottawa are usually found in October or August, booked 86 days in advance, depart on a Thursday or Saturday and return on a Saturday

Find flight deals from Seattle to Ottawa

Cheapest flights from Seattle to Ottawa
Explore the most affordable flight options available from Seattle to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This oojo deal was found by Cheapflights users on 10/28. 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.
Tue 11/253:10 pmSEA - YOW
1 stop22h 43mWestJet
Tue 12/25:40 amYOW - SEA
2 stops11h 40mWestJet
Deal found 10/28$315
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Wed 11/2611:10 pmSEA - YOW
1 stop12h 34mMultiple Airlines
Wed 12/35:40 amYOW - SEA
2 stops11h 55mMultiple Airlines
Deal found 10/27$362
This oojo deal was found by Cheapflights users on 10/27. 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.
Fri 11/283:10 pmSEA - YOW
2 stops30h 32mWestJet
Tue 12/95:40 amYOW - SEA
2 stops11h 40mWestJet
Deal found 10/27$434
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Tue 11/253:10 pmSEA - YOW
3 stops30h 32mMultiple Airlines
Tue 12/26:55 pmYOW - SEA
2 stops22h 40mMultiple Airlines
Deal found 10/28$441
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 12/157:55 amSEA - YOW
1 stop7h 30mMultiple Airlines
Mon 12/158:55 pmYOW - SEA
2 stops20h 25mMultiple Airlines
Deal found 10/28$521
This Air Canada deal was found by Cheapflights users on 10/27. 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.
Fri 11/2810:05 amSEA - YOW
1 stop11h 13mAir Canada
Tue 12/97:45 amYOW - SEA
1 stop9h 46mAir Canada
Deal found 10/27$527
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 12/153:40 pmSEA - YOW
2 stops22h 33mMultiple Airlines
Mon 12/225:40 amYOW - SEA
1 stop16h 31mMultiple Airlines
Deal found 10/28$558

Cheap flight deals from Seattle to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Ottawa (YOW). 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$259
(United Airlines)

One-way from

$187
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$393
Provider with most accurate pricing for Seattle/Tacoma Intl-Ottawa flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Ottawa flights.
Search Deals
From Seattle/Tacoma Intl to Ottawa
Search Deals
One-way flight from Seattle/Tacoma Intl to Ottawa
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Ottawa 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 October 28, 2025.
Use the filters below to find and compare flights from Seattle to Ottawa that are best for you.

Fly from

Seattle

Fly to

Ottawa

Route

Depart

Return

Price

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 3/10

11:59 pm-10:26 am

1 stop7h 27m

Ottawa

Wed 3/11

2:15 pm-8:35 pm

1 stop9h 20m

$259

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 1/12

8:00 pm-6:43 am

1 stop7h 43m

Ottawa

Sun 1/18

6:00 am-2:31 pm

2 stops11h 31m

$284

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 2/17

7:00 am-9:18 pm

1 stop11h 18m

Ottawa

Thu 2/26

6:20 am-10:43 pm

1 stop19h 23m

$287

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 2/18

11:59 pm-10:26 am

1 stop7h 27m

Ottawa

Thu 3/12

2:15 pm-8:35 pm

1 stop9h 20m

$287

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 2/6

11:45 pm-1:32 pm

1 stop10h 47m

Ottawa

Sat 3/14

5:57 pm-11:52 pm

1 stop8h 55m

$287

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 2/23

7:00 am-9:18 pm

1 stop11h 18m

Ottawa

Thu 2/26

2:15 pm-8:56 pm

1 stop9h 41m

$287

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 2/17

11:59 pm-5:07 pm

1 stop14h 08m

Ottawa

Wed 3/11

3:11 pm-11:52 pm

1 stop11h 41m

$287

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 2/23

12:37 pm-10:26 am

2 stops18h 49m

Ottawa

Sat 3/14

5:57 pm-11:52 pm

1 stop8h 55m

$293

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 2/18

12:37 pm-10:26 am

2 stops18h 49m

Ottawa

Wed 2/25

9:45 am-8:56 pm

1 stop14h 11m

$293

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 11/20

11:10 pm-8:05 pm

1 stop17h 55m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 18 results
1
2

Compare providers for flights from Seattle to Ottawa

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 Seattle to Ottawa in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice 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 Seattle-Ottawa flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Ottawa flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Ottawa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Ottawa 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 Seattle-Ottawa 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 Seattle to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Seattle 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 Seattle to Ottawa

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Ottawa. Price data was last updated on October 24, 2025.

The price you pay for your flight from Seattle to Ottawa may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, May is the cheapest month in which you can book a flight from Seattle to Ottawa (average of $205). Flying from Seattle to Ottawa in December is currently the most expensive (average of $301). 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 SEA to YOW?

Find hourly flight availability from Seattle to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

When flying from Seattle to Ottawa, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 31% versus a flight in the morning.

What is the cheapest day to fly from Seattle to Ottawa?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Ottawa. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Ottawa flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. 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 Ottawa. Reviews last updated October 28, 2025.
Read reviews from past customers who have flown United Airlines, WestJet, and Air Canada from Seattle to Ottawa. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,001 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,001 reviews
United Airlines
7.4
Good
9,001 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
WestJet
7.2
Good
3,148 reviews
United Airlines
7.4
Good
9,001 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,371 reviews
United Airlines
7.4
Good
9,001 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Seattle to Ottawa. 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 Seattle to Ottawa?

    There are many flights that can get you from Seattle to Ottawa in 7h 27m. Fly via United Airlines or Air Canada to get the fastest option. Seattle and Ottawa 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 Seattle to Ottawa round-trip?

    According to our current data, Air Canada ($256), United Airlines ($282), and WestJet ($294) offers the cheapest pricing from Seattle to Ottawa. Users have found that Air Canada is 48% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Ottawa 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 Seattle to Ottawa?

    Currently, May is the cheapest month in which you can book a flight from Seattle to Ottawa (average of $205). Flying from Seattle to Ottawa in December is currently the most expensive (average of $301). 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
Gatineau
Petawawa

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Alternative routes for Seattle to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Seattle to Ottawa

Discover the top 3 airlines that operate flights from Seattle to Ottawa. 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$256Average$540FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$282Average$592FlexibilityNo cancel feeOn-time69%
WestJetCheapest$294Average$403FlexibilityNo cancel feeOn-time60%

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