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Cheap flights from Seattle to Ottawa from C$ 164

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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
9 Apr — 16 Apr1
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 4 April 2025.

Round-trip from

C$ 414

One-way from

C$ 164

Popular in

January

Cheapest in

September

Average price

C$ 883
WestJet
  • WestJet
  • 10/5-12/5
  • 3 total stops
  • 24h 14m total
  • Seattle to Ottawa
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WestJet
  • WestJet
  • 5/7
  • 1 total stop
  • 8h 10m total
  • Seattle to Ottawa
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 27 potential savings vs. average RT price).
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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 4 April 2025.

Sat 10/57:05 a.m.SEA - YOW
2 stops14h 16mMultiple Airlines
Mon 12/56:00 a.m.YOW - SEA
1 stop9h 58mMultiple Airlines
Deal found 4/4C$ 414
Thu 10/77:35 p.m.SEA - YOW
1 stop8h 10mWestJet
Sun 13/76:10 a.m.YOW - SEA
1 stop9h 21mWestJet
Deal found 3/4C$ 434
Sun 25/55:30 a.m.SEA - YOW
1 stop7h 49mAir Canada
Wed 28/52:35 p.m.YOW - SEA
1 stop8h 02mAir Canada
Deal found 4/4C$ 587
Wed 23/411:45 p.m.SEA - YOW
1 stop11h 19mUnited Airlines
Tue 6/55:15 a.m.YOW - SEA
1 stop8h 30mUnited Airlines
Deal found 3/4C$ 609

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 4 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

Sat 10/5

7:05 a.m.-12:21 a.m.

2 stops14h 16m

Ottawa

Mon 12/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 414

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 10/7

7:35 p.m.-6:45 a.m.

1 stop8h 10m

Ottawa

Sun 13/7

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

1 stop9h 21m

C$ 434

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sun 25/5

5:30 a.m.-4:19 p.m.

1 stop7h 49m

Ottawa

Wed 28/5

2:35 p.m.-7:37 p.m.

1 stop8h 02m

C$ 587

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 23/4

11:45 p.m.-2:04 p.m.

1 stop11h 19m

Ottawa

Tue 6/5

5:15 a.m.-10:45 a.m.

1 stop8h 30m

C$ 609

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 5/7

7:35 p.m.-6:45 a.m.

1 stop8h 10m

C$ 164

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 8/5

6:00 a.m.-5:25 a.m.

3 stops20h 25m

C$ 213

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Sat 5/7

7:35 p.m.-6:45 a.m.

1 stop8h 10m

C$ 266

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Wed 23/4

12:46 p.m.-9:58 a.m.

1 stop18h 12m

C$ 273

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

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 28 March 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 4 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 4 April 2025.
Delta
8.0
Very good
7,901 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,901 reviews
Delta
8.0
Very good
7,901 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,618 reviews
Delta
8.0
Very good
7,901 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,795 reviews
Delta
8.0
Very good
7,901 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,036 reviews
Delta
8.0
Very good
7,901 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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$ 434 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at C$ 587 and C$ 609 round-trip. WestJet is 44% 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$ 164 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from C$ 266 and C$ 273, 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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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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