CA $280 Cheap Flights from Ottawa (YOW) to Seattle (SEA)

View CA $280 flight on Sat, Aug 1, 2026Opens in a new window

Popular airlines from Ottawa International Airport (YOW) to Seattle-Tacoma International Airport (SEA)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from Ottawa (YOW) to Seattle (SEA)

Prices were available within the past 7 days and start at CA $280 for one-way flights and CA $471 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Fri, Aug 14 - Fri, Sep 4
YOW
Ottawa
SEA
Seattle
CA $471 Roundtrip, found 6 days ago
CA $471
Roundtrip
found 6 days ago
Select WestJet flight, departing Fri, Aug 14 from Ottawa to Seattle, returning Fri, Sep 4, priced at CA $471 found 6 days ago
WestJet
Thu, May 21 - Sat, Jul 11
YOW
Ottawa
SEA
Seattle
CA $473 Roundtrip, found 5 days ago
CA $473
Roundtrip
found 5 days ago
Select WestJet flight, departing Thu, May 21 from Ottawa to Seattle, returning Sat, Jul 11, priced at CA $473 found 5 days ago
WestJet
Mon, Jun 15 - Tue, Jun 30
YOW
Ottawa
SEA
Seattle
CA $481 Roundtrip, found 5 days ago
CA $481
Roundtrip
found 5 days ago
Select WestJet flight, departing Mon, Jun 15 from Ottawa to Seattle, returning Tue, Jun 30, priced at CA $481 found 5 days ago
WestJet
Thu, Jul 30 - Sat, Aug 8
YOW
Ottawa
SEA
Seattle
CA $486 Roundtrip, found 3 days ago
CA $486
Roundtrip
found 3 days ago
Select WestJet flight, departing Thu, Jul 30 from Ottawa to Seattle, returning Sat, Aug 8, priced at CA $486 found 3 days ago
WestJet
Mon, Jul 27 - Wed, Aug 5
YOW
Ottawa
SEA
Seattle
CA $486 Roundtrip, found 3 days ago
CA $486
Roundtrip
found 3 days ago
Select WestJet flight, departing Mon, Jul 27 from Ottawa to Seattle, returning Wed, Aug 5, priced at CA $486 found 3 days ago
WestJet
Fri, Jun 12 - Tue, Jun 30
YOW
Ottawa
SEA
Seattle
CA $502 Roundtrip, found 4 days ago
CA $502
Roundtrip
found 4 days ago
Select WestJet flight, departing Fri, Jun 12 from Ottawa to Seattle, returning Tue, Jun 30, priced at CA $502 found 4 days ago
WestJet
Tue, Sep 1 - Fri, Sep 18
YOW
Ottawa
SEA
Seattle
CA $504 Roundtrip, found 2 days ago
CA $504
Roundtrip
found 2 days ago
Select WestJet flight, departing Tue, Sep 1 from Ottawa to Seattle, returning Fri, Sep 18, priced at CA $504 found 2 days ago
Air Canada
Sun, May 17 - Wed, Jul 1
YOW
Ottawa
SEA
Seattle
CA $571 Roundtrip, found 5 days ago
CA $571
Roundtrip
found 5 days ago
Select Air Canada flight, departing Sun, May 17 from Ottawa to Seattle, returning Wed, Jul 1, priced at CA $571 found 5 days ago
Delta
Fri, Aug 21 - Thu, Sep 3
YOW
Ottawa
SEA
Seattle
CA $585 Roundtrip, found 1 day ago
CA $585
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Aug 21 from Ottawa to Seattle, returning Thu, Sep 3, priced at CA $585 found 1 day ago
American Airlines
Thu, May 28 - Tue, Jun 2
YOW
Ottawa
SEA
Seattle
CA $969 Roundtrip, found 17 hours ago
CA $969
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Thu, May 28 from Ottawa to Seattle, returning Tue, Jun 2, priced at CA $969 found 17 hours ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from CA $891
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from CA $891

Frequently asked questions

How do I find cheap flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 39 connecting flights per day from Ottawa Macdonald-Cartier Intl. (YOW) to Seattle - Tacoma Intl. (SEA). Some common connection points include Pearson Intl. (YYZ), O'Hare Intl. (ORD), and Calgary Intl. (YYC).
What is the earliest flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs at approximately 5:00 AM local time, operated by Air Canada. This is a seasonal service active in May, July, August, and October. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you're flying from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), you'll typically find the most flights on a Monday, with around 29 flights available. This gives you a good selection of options to choose from. Major airlines on this route include Air Canada, United Airlines, and Porter Airlines.
What are the most popular departure times for flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Ottawa Macdonald-Cartier Intl. (YOW) to Seattle - Tacoma Intl. (SEA) are in the morning, from 6am to 9am. About 29% of passengers prefer this time. Many major carriers, including United Airlines, Air Canada and Porter Airlines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day and arrive at your destination with plenty of time.
How long does it take to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flights from YOW to SEA with one stop typically take around 8 hours 20 minutes, covering approximately 2,194 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Select the "Business class" and "First class" filters when looking for YOW to SEA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from Macdonald-Cartier Intl. (YOW)?
From Macdonald-Cartier Intl. (YOW), you can fly into Seattle - Tacoma Intl. (SEA) to reach Seattle. Some flights may connect through major hubs like Pearson Intl. (YYZ), Calgary Intl. (YYC), Washington Dulles Intl. (IAD) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Macdonald-Cartier Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, American Airlines, Delta, United, WestJet
Roundtrip price
CA $470
Distance
3510 km

Book with confidence

Ottawa to Seattle Flights

The easy way to book your flights from Ottawa to Seattle 

With Expedia, it’s simple to find and book flights to Seattle from Ottawa whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Seattle - Tacoma Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ottawa to Seattle today, tomorrow, or this week.  

 

Save dollars with cheap flights from Macdonald-Cartier Intl., YOW to Seattle - Tacoma Intl., SEA 

Sort your search results by price to find great deals on your flight from Ottawa to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Ottawa currently is just CA $471 rising to CA $969.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Seattle  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Seattle from Ottawa 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today.

Ottawa to Seattle Flights

Explore a world of travel with Expedia

*Available to Expedia members.