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Cheap flights from Seattle to Ottawa from C$ 157

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 27 January 2026.

Mon 9/33:10 p.m.
SEA
-
YOW
1 stop22h 43m
WestJet
Wed 11/35:40 a.m.
YOW
-
SEA
2 stops11h 39m
WestJet
Deal found 26/1C$ 390
Tue 3/311:08 p.m.
SEA
-
YOW
1 stop12h 36m
Multiple Airlines
Thu 5/35:40 a.m.
YOW
-
SEA
2 stops11h 39m
Multiple Airlines
Deal found 26/1C$ 442
Wed 11/33:10 p.m.
SEA
-
YOW
1 stop22h 43m
Multiple Airlines
Wed 18/37:45 a.m.
YOW
-
SEA
1 stop10h 16m
Multiple Airlines
Deal found 25/1C$ 444
Fri 13/35:40 a.m.
SEA
-
YOW
1 stop7h 05m
Air Canada
Fri 20/35:50 p.m.
YOW
-
SEA
1 stop8h 06m
Air Canada
Deal found 27/1C$ 485
Mon 9/33:10 p.m.
SEA
-
YOW
1 stop22h 43m
Multiple Airlines
Wed 11/35:40 a.m.
YOW
-
SEA
1 stop16h 38m
Multiple Airlines
Deal found 26/1C$ 501
Wed 11/35:50 a.m.
SEA
-
YOW
2 stops10h 28m
Air Canada
Wed 18/35:45 a.m.
YOW
-
SEA
2 stops12h 16m
Air Canada
Deal found 25/1C$ 509
Sat 28/28:00 p.m.
SEA
-
YOW
1 stop7h 43m
Air Canada
Tue 31/36:00 p.m.
YOW
-
SEA
1 stop7h 10m
Air Canada
Deal found 25/1C$ 542
Wed 4/38:00 p.m.
SEA
-
YOW
1 stop7h 43m
Air Canada
Sun 8/35:45 a.m.
YOW
-
SEA
2 stops12h 16m
Air Canada
Deal found 25/1C$ 555

Find 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 27 January 2026.

Round-trip from

C$ 390

One-way from

C$ 157

Popular in

December

Cheapest in

October

Average price

C$ 738
WestJet
  • WestJet
  • 9/3-11/3
  • 3 total stops
  • 34h 22m total
  • Seattle to Ottawa
Search Deals
WestJet
  • WestJet
  • 30/5
  • 1 total stop
  • 7h 05m total
  • Seattle to Ottawa
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 148 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 629,999 searches. Data last updated 27 January 2026.
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 3/3

11:08 p.m.-2:44 p.m.

1 stop12h 36m

Ottawa

Thu 5/3

5:40 a.m.-2:19 p.m.

2 stops11h 39m

C$ 442

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 11/3

3:10 p.m.-4:53 p.m.

1 stop22h 43m

Ottawa

Wed 18/3

7:45 a.m.-3:01 p.m.

1 stop10h 16m

C$ 444

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 13/3

5:40 a.m.-3:45 p.m.

1 stop7h 05m

Ottawa

Fri 20/3

2:05 p.m.-10:56 p.m.

2 stops11h 51m

C$ 492

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 11/3

5:50 a.m.-7:18 p.m.

2 stops10h 28m

Ottawa

Wed 18/3

5:45 a.m.-3:01 p.m.

2 stops12h 16m

C$ 509

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 28/2

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

1 stop7h 43m

Ottawa

Tue 31/3

6:00 p.m.-10:10 p.m.

1 stop7h 10m

C$ 542

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 4/3

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

1 stop7h 43m

Ottawa

Sun 8/3

5:45 a.m.-2:01 p.m.

2 stops12h 16m

C$ 555

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 30/5

7:35 p.m.-5:40 a.m.

1 stop7h 05m

C$ 157

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 12/3

7:55 a.m.-12:39 a.m.

1 stop13h 44m

C$ 223

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 11/2

5:00 a.m.-9:18 p.m.

2 stops13h 18m

C$ 252

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 27/6

2:05 p.m.-5:28 a.m.

2 stops12h 23m

C$ 378

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/1

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 23 January 2026.

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$ 278). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 756). 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.

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 05m. Air Canada provides one of the quickest options available for as low as C$ 492. 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, May is the cheapest month in which you can book a flight from Seattle to Ottawa (average of C$ 278). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 756). 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
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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