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Cheap flights from Seattle to Ottawa from C$ 220

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
4 May — 11 May1
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 April 2025.

Round-trip from

C$ 461

One-way from

C$ 220

Popular in

January

Cheapest in

September

Average price

C$ 780
28/5-4/6
  • 28/5-4/6
  • 3 total stops
  • 35h 26m total
  • Seattle to Ottawa
Search Deals
WestJet
  • WestJet
  • 5/10
  • 1 total stop
  • 8h 15m total
  • Seattle to Ottawa
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 205 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 2025.

Wed 28/56:00 a.m.SEA - YOW
1 stop10h 55mMultiple Airlines
Wed 4/64:40 p.m.YOW - SEA
2 stops24h 31mMultiple Airlines
Deal found 28/4C$ 461
Wed 11/67:05 a.m.SEA - YOW
1 stop14h 36mWestJet
Sun 15/66:10 a.m.YOW - SEA
1 stop9h 21mWestJet
Deal found 29/4C$ 488
Thu 12/65:30 a.m.SEA - YOW
2 stops10h 56mAir Canada
Thu 19/65:15 a.m.YOW - SEA
2 stops10h 46mAir Canada
Deal found 28/4C$ 514
Thu 12/611:50 p.m.SEA - YOW
1 stop14h 39mUnited Airlines
Thu 19/65:15 a.m.YOW - SEA
1 stop8h 36mUnited Airlines
Deal found 27/4C$ 722

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 April 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

Wed 28/5

6:00 a.m.-7:55 p.m.

1 stop10h 55m

Ottawa

Wed 4/6

4:40 p.m.-2:11 p.m.

2 stops24h 31m

C$ 461

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 11/6

7:05 a.m.-12:41 a.m.

1 stop14h 36m

Ottawa

Sun 15/6

6:10 a.m.-12:31 p.m.

1 stop9h 21m

C$ 488

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 12/6

5:30 a.m.-7:26 p.m.

2 stops10h 56m

Ottawa

Thu 19/6

5:15 a.m.-1:01 p.m.

2 stops10h 46m

C$ 514

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 12/6

11:50 p.m.-5:29 p.m.

1 stop14h 39m

Ottawa

Thu 19/6

5:15 a.m.-10:51 a.m.

1 stop8h 36m

C$ 722

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 5/10

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

1 stop8h 15m

C$ 220

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 30/5

8:25 a.m.-12:21 a.m.

3 stops12h 56m

C$ 237

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 10/7

7:20 a.m.-7:00 p.m.

1 stop8h 40m

C$ 291

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 9/7

12:20 a.m.-9:35 p.m.

1 stop18h 15m

C$ 320

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

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 April 2025.

The best time to book flights from Seattle to Ottawa is 65 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 April 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.

Rainfall in Ottawa by month

Plan your trip to Ottawa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ottawa ranges from 50.0 - 93.0 mm per month. June is typically the wettest month, when rainfall can reach 93.0 mm. February is typically the driest time to visit Ottawa when rainfall is around 50.0 mm.

Temperature in Ottawa by month

Plan your trip to Ottawa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ottawa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -10.0 C).

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 April 2025.
United Airlines
7.4
Good
8,696 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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
8,696 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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
2,823 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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
7.0
Good
9,240 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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 are the cheapest airlines flying 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$ 488 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at C$ 514 and C$ 722 round-trip. WestJet is 34% 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$ 220 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$ 291 and C$ 320, 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 Seattle?

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

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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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