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Cheap flights from Seattle to Ottawa from C$ 237

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
3 Aug — 10 Aug1
1 adult

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 29 July 2025.

Round-trip from

C$ 455

One-way from

C$ 237

Popular in

October

Cheapest in

September

Average price

C$ 749
WestJet
  • WestJet
  • 18/9-21/9
  • 2 total stops
  • 15h 59m total
  • Seattle to Ottawa
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WestJet
  • WestJet
  • 19/8
  • 2 total stops
  • 23h 15m total
  • Seattle to Ottawa
Search Deals
High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 3% potential price decrease (C$ 34 potential savings vs. average RT price).
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Average for round-trip flights in July 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 29 July 2025.

Thu 18/97:05 a.m.SEA - YOW
1 stop8h 15mWestJet
Sun 21/93:45 p.m.YOW - SEA
1 stop7h 44mWestJet
Deal found 29/7C$ 455
Thu 18/91:50 p.m.SEA - YOW
3 stops24h 31mMultiple Airlines
Sun 21/98:45 a.m.YOW - SEA
2 stops14h 44mMultiple Airlines
Deal found 29/7C$ 564

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 629,999 searches. Data last updated 29 July 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

Thu 18/9

7:05 a.m.-6:20 p.m.

1 stop8h 15m

Ottawa

Sun 21/9

3:45 p.m.-8:29 p.m.

1 stop7h 44m

C$ 455

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 18/9

1:50 p.m.-5:21 p.m.

3 stops24h 31m

Ottawa

Sun 21/9

8:45 a.m.-8:29 p.m.

2 stops14h 44m

C$ 564

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 19/8

2:05 p.m.-4:20 p.m.

2 stops23h 15m

C$ 237

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 25/8

7:35 p.m.-5:58 a.m.

1 stop7h 23m

C$ 283

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 5/10

5:30 a.m.-4:12 p.m.

1 stop7h 42m

C$ 331

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 11/8

12:20 a.m.-5:06 p.m.

1 stop13h 46m

C$ 620

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/7

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 25 July 2025.

The best time to book flights from Seattle to Ottawa is 84 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 Seattle to Ottawa?

Currently, October is the cheapest month in which you can book a flight from Seattle to Ottawa (average of C$ 224). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 326). 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 29 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Ottawa as you normally would.

What’s the top layover airport for flights from Seattle to Ottawa?

Share of one-stop round-trip flights from Seattle to Ottawa chosen by Cheapflights users in the past 12 months, using the same layover each way.

Chicago (ORD) – chosen by Cheapflights users on 29% of one-stop itineraries from Seattle to Ottawa on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Ottawa?

Average round-trip fare for 1-stop flights from Seattle to Ottawa, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 432.

What’s the fastest layover option from Seattle to Ottawa?

Shortest average travel time for 1-stop one-way flights from Seattle to Ottawa, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 3h 24m.

Which airport typically offers the quickest layover for flights from Seattle to Ottawa?

Average layover duration for 1-stop one-way flights from Seattle to Ottawa, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 12m.

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 29 July 2025.
Read through reviews of airlines operating flights from Seattle to Ottawa, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

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
8,899 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

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
2,973 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

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
9,822 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

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.

  • What is the cheapest airline to fly from Seattle to Ottawa round-trip?

    Our cheapest airline available from Seattle to Ottawa is WestJet. Our recent data shows that you can find tickets from as low as C$ 455 on this airline. WestJet is 37% cheaper than the average price of flights available within the next 90 days to this destination.

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

    C$ 237 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 C$ 331 and C$ 620, respectively.

  • 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, October is the cheapest month in which you can book a flight from Seattle to Ottawa (average of C$ 224). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 326). 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Brockville
Smiths Falls
Perth
Prescott
Pembroke
Wakefield

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How does Cheapflights help users find flights from Seattle to Ottawa?

When you search for this flight from Seattle to Ottawa, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Ottawa?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Ottawa for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Ottawa with no change fees?

Certainly. Search results for flights to Ottawa from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Seattle to Ottawa become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ottawa from Seattle today and book when prices fit your budget.

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