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Cheap flights from Seattle to Ottawa from C$ 215

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 342

One-way from

C$ 215

Popular in

October

Cheapest in

August

Average price

C$ 585
WestJet
  • WestJet
  • 17/10-20/10
  • 3 total stops
  • 22h 41m total
  • Seattle to Ottawa
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Air Canada
  • Air Canada
  • 5/10
  • 2 total stops
  • 10h 59m total
  • Seattle to Ottawa
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 110 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease (C$ 68 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 11 September 2025.

Fri 17/108:40 a.m.SEA - YOW
2 stops12h 42mWestJet
Mon 20/106:00 a.m.YOW - SEA
1 stop9h 59mWestJet
Deal found 9/9C$ 342
Wed 8/101:50 p.m.SEA - YOW
1 stop7h 50mWestJet
Thu 23/106:00 a.m.YOW - SEA
1 stop9h 59mWestJet
Deal found 10/9C$ 362
Tue 21/107:05 a.m.SEA - YOW
1 stop8h 15mWestJet
Thu 23/105:55 a.m.YOW - SEA
2 stops10h 04mWestJet
Deal found 10/9C$ 376
Thu 16/101:50 p.m.SEA - YOW
1 stop7h 50mWestJet
Sun 19/105:55 a.m.YOW - SEA
2 stops34h 04mWestJet
Deal found 9/9C$ 388

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 11 September 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 17/10

8:40 a.m.-12:22 a.m.

2 stops12h 42m

Ottawa

Mon 20/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

C$ 342

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 8/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

Ottawa

Thu 23/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

C$ 362

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 21/10

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

1 stop8h 15m

Ottawa

Thu 23/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

C$ 362

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 16/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

Ottawa

Sun 19/10

5:55 a.m.-12:59 p.m.

2 stops34h 04m

C$ 388

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 17/10

8:40 a.m.-12:22 a.m.

2 stops12h 42m

Ottawa

Sun 19/10

5:55 a.m.-12:59 p.m.

2 stops34h 04m

C$ 395

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 29/9

1:12 p.m.-9:58 a.m.

1 stop17h 46m

Ottawa

Tue 30/9

12:30 p.m.-6:31 p.m.

1 stop9h 01m

C$ 446

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 5/10

5:30 a.m.-7:29 p.m.

2 stops10h 59m

C$ 215

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

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 29 August 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 11 September 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.

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?

    A quick flight from Seattle to Ottawa can take about 12h 42m. WestJet provides one of the quickest options available for as low as C$ 342. The distance from Seattle to Ottawa is about 3529 km.

  • 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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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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