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CA $310 Cheap Flights from Ottawa (YOW) to Seattle (SEA)

View CA $310 flight on Wed, Oct 7, 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 CA $310 for one-way flights and CA $546 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Wed, Oct 7 - Sun, Oct 11
YOW
Ottawa
SEA
Seattle
CA $546 Roundtrip, found 19 hours ago
CA $546
Roundtrip
found 19 hours ago
Select WestJet flight, departing Wed, Oct 7 from Ottawa to Seattle, returning Sun, Oct 11, priced at CA $546 found 19 hours ago
WestJet
Mon, Sep 7 - Sun, Sep 13
YOW
Ottawa
SEA
Seattle
CA $548 Roundtrip, found 6 days ago
CA $548
Roundtrip
found 6 days ago
Select WestJet flight, departing Mon, Sep 7 from Ottawa to Seattle, returning Sun, Sep 13, priced at CA $548 found 6 days ago
WestJet
Fri, Oct 9 - Mon, Oct 12
YOW
Ottawa
SEA
Seattle
CA $556 Roundtrip, found 9 hours ago
CA $556
Roundtrip
found 9 hours ago
Select WestJet flight, departing Fri, Oct 9 from Ottawa to Seattle, returning Mon, Oct 12, priced at CA $556 found 9 hours ago
WestJet
Thu, Sep 17 - Sun, Sep 20
YOW
Ottawa
SEA
Seattle
CA $557 Roundtrip, found 4 days ago
CA $557
Roundtrip
found 4 days ago
Select WestJet flight, departing Thu, Sep 17 from Ottawa to Seattle, returning Sun, Sep 20, priced at CA $557 found 4 days ago
WestJet
Thu, Sep 3 - Fri, Sep 4
YOW
Ottawa
SEA
Seattle
CA $560 Roundtrip, found 2 days ago
CA $560
Roundtrip
found 2 days ago
Select WestJet flight, departing Thu, Sep 3 from Ottawa to Seattle, returning Fri, Sep 4, priced at CA $560 found 2 days ago
WestJet
Wed, Oct 14 - Sat, Oct 17
YOW
Ottawa
SEA
Seattle
CA $560 Roundtrip, found 1 day ago
CA $560
Roundtrip
found 1 day ago
Select WestJet flight, departing Wed, Oct 14 from Ottawa to Seattle, returning Sat, Oct 17, priced at CA $560 found 1 day ago
WestJet
Mon, Sep 14 - Fri, Oct 2
YOW
Ottawa
SEA
Seattle
CA $578 Roundtrip, found 1 hour ago
CA $578
Roundtrip
found 1 hour ago
Select WestJet flight, departing Mon, Sep 14 from Ottawa to Seattle, returning Fri, Oct 2, priced at CA $578 found 1 hour ago
United
Fri, Feb 26 - Sat, Mar 6
YOW
Ottawa
SEA
Seattle
CA $597 Roundtrip, found 4 days ago
CA $597
Roundtrip
found 4 days ago
Select United flight, departing Fri, Feb 26 from Ottawa to Seattle, returning Sat, Mar 6, priced at CA $597 found 4 days ago
Air Canada
Fri, Feb 26 - Sat, Mar 6
YOW
Ottawa
SEA
Seattle
CA $632 Roundtrip, found 4 days ago
CA $632
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Feb 26 from Ottawa to Seattle, returning Sat, Mar 6, priced at CA $632 found 4 days ago
Delta
Fri, Oct 16 - Sun, Oct 18
YOW
Ottawa
SEA
Seattle
CA $635 Roundtrip, found 1 day ago
CA $635
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Oct 16 from Ottawa to Seattle, returning Sun, Oct 18, priced at CA $635 found 1 day 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 $934
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from CA $934

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

June is typically the cheapest month to fly

From CA $383 - CA $843 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 cheap one-way flights from CA $310 and cheap return flights from CA $546 YOW to SEA with Expedia. One-way flights typically cost between CA$316 and CA$1182, and return flights often range between CA$692 and CA$2413. 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 the 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) to Seattle, WA (SEA)?
Enter YOW to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
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 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.
What day of the week has the most flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) on a Wednesday, with around 32 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Air Canada, United, and Porter Airlines. Flight schedules are quite consistent throughout the week, with Wednesday offering only slightly more options than other days.
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, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the early morning, from 6am to 9am. Many major carriers, including United, Porter Airlines and WestJet, offer flights during this window. Many travellers prefer these times because it allows for an early start to their journey, often leading to an earlier arrival at their destination.
How long does it take to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flying from YOW to SEA with a connection usually takes about 8 hours 50 minutes, traveling roughly 3,531 kilometers. 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.)?
Yes, you can fly business class or first class between YOW and SEA. You can fly business class with Air Canada.First class cabins are available on United.
How do I earn miles on a Ottawa, ON (YOW) to Seattle, WA (SEA) flight with Expedia?
It's easy to earn miles on a Ottawa, ON (YOW) to Seattle, WA (SEA) 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) to Seattle, WA (SEA) at the last minute?
Typically, booking a last minute flight from Ottawa, ON (YOW) to Seattle, WA (SEA) 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) to Seattle, WA (SEA) flight and hotel package?
Securing a Ottawa, ON (YOW) to Seattle, WA (SEA) 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 $546
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 $546 rising to CA $635.  

Here are more money-saving tips: 

  • Fly in October 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

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