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£170 Cheap Flights from Ottawa (YOW) to Seattle (SEA)

View £170 flight on Sun, 4 Oct 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £170 for one-way flights and £302 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£302 Return, found 6 days ago
£302
Return
found 6 days ago
Select WestJet flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £302 found 6 days ago
WestJet
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£310 Return, found 6 days ago
£310
Return
found 6 days ago
Select WestJet flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £310 found 6 days ago
Air Canada
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£361 Return, found 6 days ago
£361
Return
found 6 days ago
Select Air Canada flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £361 found 6 days ago
Air Canada
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£367 Return, found 6 days ago
£367
Return
found 6 days ago
Select Air Canada flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £367 found 6 days ago
Air Canada
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£368 Return, found 6 days ago
£368
Return
found 6 days ago
Select Air Canada flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £368 found 6 days ago
Air Canada
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£374 Return, found 6 days ago
£374
Return
found 6 days ago
Select Air Canada flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £374 found 6 days ago
Air Canada
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£375 Return, found 6 days ago
£375
Return
found 6 days ago
Select Air Canada flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £375 found 6 days ago
Air Canada
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£380 Return, found 6 days ago
£380
Return
found 6 days ago
Select Air Canada flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £380 found 6 days ago
WestJet
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£381 Return, found 6 days ago
£381
Return
found 6 days ago
Select WestJet flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £381 found 6 days ago
Air Canada
Sun, 4 Oct - Sun, 11 Oct
YOW
Ottawa
SEA
Seattle
£385 Return, found 6 days ago
£385
Return
found 6 days ago
Select Air Canada flight, departing Sun, 4 Oct from Ottawa to Seattle, returning Sun, 11 Oct, priced at £385 found 6 days ago

Find the cheapest month to fly from Ottawa (YOW) to Seattle (SEA)

May is typically the cheapest month to fly

From £202 - £381 per traveller.

Frequently asked questions

How much does a flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find one-way and return flights from YOW to SEA with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when YOW to SEA ticket fares go up or down.
What is the cheapest month to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest months to fly from YOW to SEA are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Enter YOW to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Air North is one of the cheapest airlines offering connecting return flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), with tickets starting from around £553 for flights that can be booked for departure within the next year. These prices are per adult, for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Ottawa, ON (YOW) to Seattle, WA (SEA)?
To find a cheap flight from Ottawa, ON (YOW) to Seattle, WA (SEA), 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.
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 around 5:00 AM local time. This service is usually operated by Air Canada. This is a seasonal service, active in May, July, August, September, and October. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are no nonstop flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). The journey covers a distance of approximately 3531 kilometres. If you're looking for flights with one stop, these typically take around 8 hours 18 minutes. Flights with two or more stops will take longer, usually around 14 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns.
Can you fly business or first class from Ottawa, ON (YOW) to Seattle, WA (SEA)?
Select the "Business class" and "First class" filters when looking for Ottawa, ON (YOW) to Seattle, WA (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, WA (SEA) from Ottawa, ON (YOW)?
If you're planning to travel to Seattle from Macdonald-Cartier Intl. (YOW), you can fly directly into Seattle - Tacoma Intl. (SEA). Some flights may connect through major hubs like Pearson Intl. (YYZ), Calgary Intl. (YYC), or 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) to Seattle, WA (SEA)?
If you booked your Ottawa, ON (YOW) to Seattle, WA (SEA) 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.
Return price
£302
Distance
3510 km

Book with confidence

Compare flights from Ottawa to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Ottawa to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Macdonald-Cartier Intl. to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Macdonald-Cartier Intl. (YOW) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from Ottawa to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Macdonald-Cartier Intl. to Seattle - Tacoma Intl. start at just £302 and range up to £385.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Ottawa and Seattle
  • booking your flight during October, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Ottawa to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Macdonald-Cartier Intl. to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Ottawa to Seattle easily and book with confidence

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*Available to Expedia members.