£146 Cheap Flights from Ottawa (YOW) to Seattle (SEA)

View £146 flight on Sat, 18 Jul 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 £146 for one-way flights and £256 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Thu, 3 Sept - Sun, 6 Sept
YOW
Ottawa
SEA
Seattle
£256 Return, found 9 hours ago
£256
Return
found 9 hours ago
Select WestJet flight, departing Thu, 3 Sept from Ottawa to Seattle, returning Sun, 6 Sept, priced at £256 found 9 hours ago
WestJet
Thu, 3 Sept - Sun, 6 Sept
YOW
Ottawa
SEA
Seattle
£279 Return, found 9 hours ago
£279
Return
found 9 hours ago
Select WestJet flight, departing Thu, 3 Sept from Ottawa to Seattle, returning Sun, 6 Sept, priced at £279 found 9 hours ago
WestJet
Fri, 5 Jun - Sun, 14 Jun
YOW
Ottawa
SEA
Seattle
£291 Return, found 5 days ago
£291
Return
found 5 days ago
Select WestJet flight, departing Fri, 5 Jun from Ottawa to Seattle, returning Sun, 14 Jun, priced at £291 found 5 days ago
WestJet
Sun, 10 May - Thu, 14 May
YOW
Ottawa
SEA
Seattle
£299 Return, found 2 days ago
£299
Return
found 2 days ago
Select WestJet flight, departing Sun, 10 May from Ottawa to Seattle, returning Thu, 14 May, priced at £299 found 2 days ago
WestJet
Thu, 3 Sept - Sun, 6 Sept
YOW
Ottawa
SEA
Seattle
£301 Return, found 9 hours ago
£301
Return
found 9 hours ago
Select WestJet flight, departing Thu, 3 Sept from Ottawa to Seattle, returning Sun, 6 Sept, priced at £301 found 9 hours ago
Air Canada
Sun, 10 May - Thu, 14 May
YOW
Ottawa
SEA
Seattle
£307 Return, found 2 days ago
£307
Return
found 2 days ago
Select Air Canada flight, departing Sun, 10 May from Ottawa to Seattle, returning Thu, 14 May, priced at £307 found 2 days ago
WestJet
Sun, 10 May - Thu, 14 May
YOW
Ottawa
SEA
Seattle
£313 Return, found 2 days ago
£313
Return
found 2 days ago
Select WestJet flight, departing Sun, 10 May from Ottawa to Seattle, returning Thu, 14 May, priced at £313 found 2 days ago
WestJet
Fri, 5 Jun - Sun, 14 Jun
YOW
Ottawa
SEA
Seattle
£314 Return, found 5 days ago
£314
Return
found 5 days ago
Select WestJet flight, departing Fri, 5 Jun from Ottawa to Seattle, returning Sun, 14 Jun, priced at £314 found 5 days ago
Air Canada
Sun, 10 May - Thu, 14 May
YOW
Ottawa
SEA
Seattle
£321 Return, found 2 days ago
£321
Return
found 2 days ago
Select Air Canada flight, departing Sun, 10 May from Ottawa to Seattle, returning Thu, 14 May, priced at £321 found 2 days ago
Air Canada
Fri, 5 Jun - Sun, 14 Jun
YOW
Ottawa
SEA
Seattle
£322 Return, found 5 days ago
£322
Return
found 5 days ago
Select Air Canada flight, departing Fri, 5 Jun from Ottawa to Seattle, returning Sun, 14 Jun, priced at £322 found 5 days 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 £299
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from £299

Frequently asked questions

How much is a flight from Ottawa International Airport to SEA?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip flight from YOW to Seattle - Tacoma Intl. Airport (SEA) was £256. Fares this good don't hang around forever, so book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from YOW to Seattle - Tacoma Intl. Airport (SEA)?
When it comes to cancellation fees, every airline has its own set of terms and conditions. If you decide to cancel your holiday, head to our Customer Service Portal.
How do I find cheap flights from Macdonald-Cartier Intl. Airport (YOW) to Seattle - Tacoma Intl. Airport (SEA) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Macdonald-Cartier Intl. Airport (YOW) to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Ottawa Intl. Airport to Seattle - Tacoma Intl. Airport (SEA)?
The flight distance from Ottawa to SeaTac is 3,500 kilometres. Bring a drink, a few snacks and a good book to read. Keep yourself entertained and the time will fly by.
Which airlines fly direct from Ottawa International Airport to SEA?
If you want to travel straight from YOW to Seattle - Tacoma Intl. Airport (SEA), you'll need to book a flight with at least one stop. Unfortunately, there aren't any airlines that fly directly on this route.
Are Ottawa Intl. Airport to SEA flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes pick up a bargain, with some of the cheapest airfares from Ottawa International Airport to SEA cropping up a few weeks before the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals frequently — as early as 12 months in advance in some cases. It depends on the carrier though, as not all airlines issue prices so far in advance.

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 directly 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, WestJet
Return price
£255
Distance
3510 km

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