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Cheap flights from Seattle to Ottawa from C$ 383

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
11 Jan — 18 Jan1
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 12 December 2025.

Sat 13/123:20 p.m.SEA - YOW
2 stops30h 22mWestJet
Mon 15/127:15 p.m.YOW - SEA
2 stops22h 05mWestJet
Deal found 9/12C$ 1,125
Tue 23/128:00 p.m.SEA - YOW
1 stop16h 45mAir Canada
Wed 31/124:15 p.m.YOW - SEA
1 stop9h 01mAir Canada
Deal found 9/12C$ 1,182
Tue 23/123:50 p.m.SEA - YOW
2 stops22h 28mUnited Airlines
Wed 31/125:09 p.m.YOW - SEA
2 stops18h 14mUnited Airlines
Deal found 9/12C$ 1,225
Mon 22/127:45 p.m.SEA - YOW
2 stops25h 57mWestJet
Thu 25/125:45 p.m.YOW - SEA
2 stops19h 14mWestJet
Deal found 11/12C$ 1,247
Mon 22/128:40 a.m.SEA - YOW
1 stop12h 45mMultiple Airlines
Thu 25/126:45 p.m.YOW - SEA
1 stop17h 17mMultiple Airlines
Deal found 11/12C$ 1,273
Tue 23/128:40 a.m.SEA - YOW
1 stop29h 45mMultiple Airlines
Wed 31/129:30 a.m.YOW - SEA
2 stops30h 00mMultiple Airlines
Deal found 9/12C$ 1,274
Sat 13/1212:48 p.m.SEA - YOW
2 stops32h 10mMultiple Airlines
Mon 15/129:25 a.m.YOW - SEA
1 stop28h 15mMultiple Airlines
Deal found 9/12C$ 1,389
Wed 10/123:10 p.m.SEA - YOW
1 stop22h 43mWestJet
Wed 17/125:45 p.m.YOW - SEA
1 stop23h 35mWestJet
Deal found 9/12C$ 1,449
Tue 23/123:44 p.m.SEA - YOW
2 stops22h 07mAmerican Airlines
Wed 31/126:45 a.m.YOW - SEA
3 stops17h 25mAmerican Airlines
Deal found 9/12C$ 2,004

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 12 December 2025.

Round-trip from

C$ 371

Popular in

December

Cheapest in

October

Average price

C$ 1,004
WestJet
  • WestJet
  • 16/4-19/4
  • 4 total stops
  • 35h 52m total
  • Seattle to Ottawa
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 152 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 12 December 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

Mon 26/1

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

1 stop22h 43m

Ottawa

Mon 2/2

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

2 stops11h 39m

C$ 383

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 2/2

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

1 stop22h 43m

Ottawa

Thu 5/2

5:45 p.m.-2:19 p.m.

1 stop23h 34m

C$ 412

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 16/4

3:10 p.m.-6:23 p.m.

2 stops24h 13m

Ottawa

Sun 19/4

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

2 stops35h 39m

C$ 421

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 12/1

3:10 p.m.-12:42 a.m.

2 stops30h 32m

Ottawa

Fri 16/1

7:15 p.m.-2:38 p.m.

2 stops22h 23m

C$ 447

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 2/2

7:00 a.m.-5:12 p.m.

1 stop7h 12m

Ottawa

Mon 2/2

7:27 p.m.-9:55 a.m.

2 stops17h 28m

C$ 466

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 23/2

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

1 stop7h 43m

Ottawa

Wed 25/2

5:50 p.m.-10:51 p.m.

1 stop8h 01m

C$ 472

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 9/2

8:10 a.m.-6:52 p.m.

1 stop7h 42m

Ottawa

Wed 11/2

6:20 a.m.-4:01 p.m.

1 stop12h 41m

C$ 492

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 9/2

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

1 stop11h 18m

Ottawa

Fri 13/2

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

1 stop15h 43m

C$ 492

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 9/2

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

1 stop12h 44m

Ottawa

Thu 12/2

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

1 stop19h 23m

C$ 492

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Mon 23/2

7:00 a.m.-5:07 p.m.

1 stop7h 07m

Ottawa

Thu 26/2

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

1 stop14h 11m

C$ 492

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

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 5 December 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$ 292). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 749). 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 12 December 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 22h 43m. WestJet provides one of the quickest options available for as low as C$ 383. 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$ 292). Flying from Seattle to Ottawa in December is currently the most expensive (average of C$ 749). 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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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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