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$151+ Cheap flights from Seattle (SEA) to Ottawa (YOW)

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YOW
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Ottawa are usually found in September or August, booked 88 days in advance, depart on a Thursday or Saturday and return on a Saturday

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 junio 12, 2025.

Round-trip from

$318
(Gotogate)

One-way from

$151
(oojo)

Popular in

February

Cheapest in

September

Average price

$486
From Seattle/Tacoma Intl to Ottawa
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One-way flight from Seattle/Tacoma Intl to Ottawa
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Highest demand for flights based on searches. 9% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Gotogate deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/111:50 pmSEA - YOW
2 stops12h 33mWestJet
lun. 9/153:35 pmYOW - SEA
1 stop7h 54mWestJet
Deal found 6/12$318
This Flightnetwork deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/277:35 pmSEA - YOW
1 stop8h 10mMultiple Airlines
dom. 8/35:15 amYOW - SEA
1 stop8h 45mMultiple Airlines
Deal found 6/12$357
This Flightnetwork deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/275:30 amSEA - YOW
2 stops11h 26mAir Canada
dom. 8/35:15 amYOW - SEA
1 stop8h 45mAir Canada
Deal found 6/12$363
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/212:20 amSEA - YOW
1 stop13h 46mUnited Airlines
vie. 7/1110:37 amYOW - SEA
1 stop11h 21mUnited Airlines
Deal found 6/11$531

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 2,558,603 searches. Data last updated junio 12, 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

jue. 9/11

1:50 pm-5:23 am

2 stops12h 33m

Ottawa

lun. 9/15

3:35 pm-8:29 pm

1 stop7h 54m

$318

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

dom. 7/27

7:35 pm-6:45 am

1 stop8h 10m

Ottawa

dom. 8/3

5:15 am-11:00 am

1 stop8h 45m

$357

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

dom. 7/27

5:30 am-7:56 pm

2 stops11h 26m

Ottawa

dom. 8/3

5:15 am-11:00 am

1 stop8h 45m

$363

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

mié. 7/2

12:20 am-5:06 pm

1 stop13h 46m

Ottawa

vie. 7/11

10:37 am-6:58 pm

1 stop11h 21m

$531

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

dom. 10/5

7:05 am-6:20 pm

1 stop8h 15m

$151

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

lun. 7/14

7:05 am-1:05 pm

2 stops27h 00m

$164

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

lun. 6/23

5:30 am-7:26 pm

2 stops10h 56m

$187

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

mar. 7/15

12:20 am-9:35 pm

1 stop18h 15m

$238

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

jue. 6/26

6:00 am-12:22 am

2 stops15h 22m

$770

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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 June 9, 2025.

The price you pay for your flight from Seattle to Ottawa may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Ottawa?

Currently, January is the cheapest month in which you can book a flight from Seattle to Ottawa (average of $294). Flying from Seattle to Ottawa in September is currently the most expensive (average of $428). 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 junio 12, 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 afternoon, which can drop the price by up to 32% versus a flight in the morning.

What is the cheapest day to fly from Seattle to Ottawa?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Ottawa. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Ottawa flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 2.0 - 3.7 inches per month. June is typically the wettest month, when rainfall can reach 3.7 in. February is typically the driest time to visit Ottawa when rainfall is around 2.0 in.

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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 F).

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 junio 12, 2025.
Read reviews from past customers who have flown Delta, United Airlines and WestJet from Seattle to Ottawa. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?

    According to our current data, WestJet ($318), Air Canada ($363), and United Airlines ($531) offers the cheapest pricing from Seattle to Ottawa. Users have found that WestJet is 37% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Ottawa one-way?

    The cheapest airlines for a one-way flight from Seattle to Ottawa are WestJet ($151), Air Canada ($187), and United Airlines ($238).

  • 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, January is the cheapest month in which you can book a flight from Seattle to Ottawa (average of $294). Flying from Seattle to Ottawa in September is currently the most expensive (average of $428). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Gatineau
Petawawa

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Alternative routes for Seattle to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Seattle to Ottawa

Discover the top 3 airlines that operate flights from Seattle to Ottawa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$244Average$509FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$282Average$586FlexibilityNo cancel feeOn-time69%
WestJetCheapest$297Average$405FlexibilityNo cancel feeOn-time60%

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