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$155+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Ottawa are usually found in August or September, booked 88 days in advance, depart on a Thursday or Saturday and return on a Saturday

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 September 11, 2025.

Round-trip from

$247
(oojo)

One-way from

$155
(Air Canada)

Popular in

October

Cheapest in

August

Average price

$422
From Seattle/Tacoma Intl to Ottawa
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One-way flight from Seattle/Tacoma Intl to Ottawa
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Highest demand for flights based on searches. 9% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This oojo deal was found by Cheapflights users on 9/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/178:40 amSEA - YOW
2 stops12h 42mWestJet
Mon 10/206:00 amYOW - SEA
1 stop9h 59mWestJet
Deal found 9/9$247
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/81:50 pmSEA - YOW
1 stop7h 50mWestJet
Thu 10/236:00 amYOW - SEA
1 stop9h 59mWestJet
Deal found 9/10$261
This oojo deal was found by Cheapflights users on 9/10. 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.
Tue 10/217:05 amSEA - YOW
1 stop8h 15mWestJet
Thu 10/235:55 amYOW - SEA
2 stops10h 04mWestJet
Deal found 9/10$271
This oojo deal was found by Cheapflights users on 9/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/161:50 pmSEA - YOW
1 stop7h 50mWestJet
Sun 10/195:55 amYOW - SEA
2 stops34h 04mWestJet
Deal found 9/9$280

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 September 11, 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

Fri 10/17

8:40 am-12:22 am

2 stops12h 42m

Ottawa

Mon 10/20

6:00 am-12:59 pm

1 stop9h 59m

$247

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 10/8

1:50 pm-12:40 am

1 stop7h 50m

Ottawa

Thu 10/23

6:00 am-12:59 pm

1 stop9h 59m

$261

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 10/21

7:05 am-6:20 pm

1 stop8h 15m

Ottawa

Thu 10/23

6:00 am-12:59 pm

1 stop9h 59m

$261

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 10/16

1:50 pm-12:40 am

1 stop7h 50m

Ottawa

Sun 10/19

5:55 am-12:59 pm

2 stops34h 04m

$280

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 10/17

8:40 am-12:22 am

2 stops12h 42m

Ottawa

Sun 10/19

5:55 am-12:59 pm

2 stops34h 04m

$285

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 9/29

1:12 pm-9:58 am

1 stop17h 46m

Ottawa

Tue 9/30

12:30 pm-6:31 pm

1 stop9h 01m

$322

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 9/28

1:15 pm-1:03 pm

1 stop20h 48m

Ottawa

Tue 9/30

5:15 pm-7:16 am

2 stops17h 01m

$335

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 10/5

5:30 am-7:29 pm

2 stops10h 59m

$155

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 August 29, 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, January is the cheapest month in which you can book a flight from Seattle to Ottawa (average of $294). Flying from Seattle to Ottawa in September is currently the most expensive (average of $419). 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 September 11, 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 32% 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 afternoons 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 September 11, 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
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
3,091 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 12h 42m. Fly via WestJet to get the fastest option. Seattle and Ottawa are separated by a distance of 2193 mi.

  • 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 52% 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, January is the cheapest month in which you can book a flight from Seattle to Ottawa (average of $294). Flying from Seattle to Ottawa in September is currently the most expensive (average of $419). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$256Average$537FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$282Average$649FlexibilityNo cancel feeOn-time69%
WestJetCheapest$294Average$403FlexibilityNo cancel feeOn-time60%

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