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Cheap flights from Seattle to Ottawa from C$ 235

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 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Seattle to Ottawa

Enter your travel dates to find the best prices.

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 28 October 2025.

Tue 25/113:10 p.m.SEA - YOW
1 stop22h 43mWestJet
Tue 2/125:40 a.m.YOW - SEA
2 stops11h 40mWestJet
Deal found 28/10C$ 441
Wed 26/1111:10 p.m.SEA - YOW
1 stop12h 34mMultiple Airlines
Wed 3/125:40 a.m.YOW - SEA
2 stops11h 55mMultiple Airlines
Deal found 27/10C$ 506
Fri 28/113:10 p.m.SEA - YOW
2 stops30h 32mWestJet
Tue 9/125:40 a.m.YOW - SEA
2 stops11h 40mWestJet
Deal found 27/10C$ 607
Tue 25/113:10 p.m.SEA - YOW
3 stops30h 32mMultiple Airlines
Tue 2/126:55 p.m.YOW - SEA
2 stops22h 40mMultiple Airlines
Deal found 28/10C$ 617
Mon 15/127:55 a.m.SEA - YOW
1 stop7h 30mMultiple Airlines
Mon 15/128:55 p.m.YOW - SEA
2 stops20h 25mMultiple Airlines
Deal found 28/10C$ 729
Fri 28/1110:05 a.m.SEA - YOW
1 stop11h 13mAir Canada
Tue 9/127:45 a.m.YOW - SEA
1 stop9h 46mAir Canada
Deal found 27/10C$ 737
Mon 15/123:40 p.m.SEA - YOW
2 stops22h 33mMultiple Airlines
Mon 22/125:40 a.m.YOW - SEA
1 stop16h 31mMultiple Airlines
Deal found 28/10C$ 780

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 28 October 2025.

Round-trip from

C$ 362

One-way from

C$ 235

Popular in

February

Cheapest in

October

Average price

C$ 550
United Airlines
  • United Airlines
  • 10/3-11/3
  • 2 total stops
  • 16h 47m total
  • Seattle to Ottawa
Search Deals
20/11
  • 20/11
  • 1 total stop
  • 17h 55m total
  • Seattle to Ottawa
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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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 28 October 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 10/3

12:45 p.m.-10:26 a.m.

2 stops18h 41m

Ottawa

Wed 11/3

2:15 p.m.-8:35 p.m.

1 stop9h 20m

C$ 369

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 12/1

8:00 p.m.-6:43 a.m.

1 stop7h 43m

Ottawa

Sun 18/1

6:00 a.m.-2:31 p.m.

2 stops11h 31m

C$ 397

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 17/2

7:00 a.m.-9:18 p.m.

1 stop11h 18m

Ottawa

Thu 26/2

6:20 a.m.-7:03 p.m.

1 stop15h 43m

C$ 401

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 16/2

7:00 a.m.-9:18 p.m.

1 stop11h 18m

Ottawa

Wed 25/2

2:15 p.m.-8:56 p.m.

1 stop9h 41m

C$ 401

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 25/2

10:55 a.m.-9:18 p.m.

1 stop7h 23m

Ottawa

Sat 14/3

5:57 p.m.-11:52 p.m.

1 stop8h 55m

C$ 401

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 10/2

7:00 a.m.-9:18 p.m.

1 stop11h 18m

Ottawa

Sat 28/2

6:20 a.m.-7:03 p.m.

1 stop15h 43m

C$ 401

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 19/2

8:17 a.m.-11:54 p.m.

1 stop12h 37m

Ottawa

Thu 26/2

6:20 a.m.-7:03 p.m.

1 stop15h 43m

C$ 401

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 10/2

8:10 a.m.-11:54 p.m.

1 stop12h 44m

Ottawa

Thu 26/2

6:20 a.m.-10:43 p.m.

1 stop19h 23m

C$ 401

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 16/2

11:59 p.m.-10:26 a.m.

1 stop7h 27m

Ottawa

Thu 26/2

9:45 a.m.-8:56 p.m.

1 stop14h 11m

C$ 401

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 8/2

7:00 a.m.-9:18 p.m.

1 stop11h 18m

Ottawa

Thu 26/2

9:45 a.m.-8:56 p.m.

1 stop14h 11m

C$ 401

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 20 results
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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 24 October 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, May is the cheapest month in which you can book a flight from Seattle to Ottawa (average of C$ 287). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 421). 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 28 October 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 evening, which can drop the price by up to 58% versus a flight in the afternoon.

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 7h 43m. United Airlines provides one of the quickest options available for as low as C$ 397. The distance from Seattle to Ottawa is about 3529 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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 C$ 287). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 421). 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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