Cheap flights from Seattle to Ottawa

Compare Seattle to Ottawa flight deals

Find the cheapest month or even day of the year to fly to Ottawa

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Flight deals from Seattle to Ottawa

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to Ottawa? If you want to travel next month, round-trip fares start from $453. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Seattle to Ottawa

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Ottawa flights are currently cheapest in June.

Alternative Seattle to Ottawa routes

Looking for the cheapest, fastest or easiest route from Seattle to Ottawa? You could fly into the following airports instead.

Finding cheap flights from Seattle to Ottawa: Frequently asked questions

There are 2 airports in Ottawa: Ottawa International and Ottawa Gatineau.
The best price we found for a round-trip flight from Seattle to Ottawa is $399. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle to Ottawa. But we found flights with one or more stops from $399.
There are no flights flying from Seattle to Ottawa, as of March 2026.
The cheapest month to fly from Seattle to Ottawa is usually April.
If you're flying from Seattle, the cheapest airport near Ottawa is Ottawa International – which is 11.2 km away from the center of Ottawa. We've found flights to this airport from $399.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Ottawa on Wednesday, April 22, 2026.
No airlines currently offer direct flights between Seattle and Ottawa. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ottawa but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Ottawa is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around -3°C. July is typically the warmest month in Ottawa, when it usually averages around 25°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -16°C. The rainiest month is June.
The cheapest airline that flies to Ottawa is WestJet.

Traveling from Seattle to Ottawa: what you need to know

  • Seattle is home to two main airports where you can set off on your adventure. Check out your options for booking a flight from Seattle to Ottawa leaving from Seattle-Tacoma International Airport (SEA) or Lake Union Sea Plane Base Airport (LKE).

  • Ottawa/Macdonald-Cartier International Airport (YOW) is where you'll be arriving in Ottawa.

  • Ottawa's timezone is UTC-4, which makes Ottawa three hours ahead of Seattle.

  • Leave enough time to get on your Seattle to Ottawa flight. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • Traveling during a peak time like July? Public holidays and other high seasons can mean longer queues and delays at security. Be extra cautious and arrive up to four hours before international flights and two hours before a domestic departure.

How to find the cheapest flights from Seattle to Ottawa

  • Booking early is often the key to scoring a cheap Seattle to Ottawa flight. Prices tend to rise as demand increases, so the closer your departure date, the more you'll likely pay.

  • The 'Whole month' tool shows you the cheapest plane tickets from Seattle to Ottawa throughout the month. It's a great way to find a bargain if your trip dates aren't set in stone.

  • Stay on top of deals for cheap flights from Seattle to Ottawa by creating a Price Alert. You'll receive an email or push notification on the app when a new discounted fare appears.

  • Tailor your flights using filters. Choose your ideal departure and arrival times, total journey duration and airlines. You can also sort the results by 'Best,' 'Fastest' or 'Cheapest' Seattle to Ottawa flights.

Flying from Seattle

Seattle-Tacoma International Airport (SEA)

  • We make it easy to find a Seattle to Ottawa flight with a stopover. To see all the options leaving from Seattle-Tacoma International Airport, deselect 'Direct flights only.' Then, simply select a flight with a stop long enough to tour your chosen city. Popular stopovers include:

    • Pearson International Airport (YYZ)

    • Vancouver International Airport (YVR)

    • Calgary International Airport (YYC)

  • The journey from central Seattle to SEA takes around 55 minutes on public transport. If you drive, ride-share or grab a cab, you'll cover the 18 kilometers in 20 minutes or so, depending on traffic.

  • Want a relaxed start to your trip? Stay near Seattle-Tacoma International Airport. Whether you're taking an early flight from Seattle to Ottawa or just don't want to be rushed, these hotels are just the thing:

  • Seattle-Tacoma International Airport has an excellent on-time performance, so you're unlikely to face delays. Departures from SEA land on schedule 81.27% of the time.

Arriving in Ottawa

Ottawa Gatineau Airport (YND)

  • The distance from Ottawa Gatineau Airport (YND) to central Ottawa is roughly 14 kilometers. It takes around 20 minutes to reach the center driving.

  • It usually takes 1 hour 40 minutes to get there when traveling by public transport.

  • The last thing you want is a long journey to your hotel if you're landing late on a flight from Seattle to Ottawa. Check in to one of these accommodation options near YND instead:

  • Set your own pace with an Ottawa Gatineau Airport rental car. Book your wheels from Hertz to explore parts of Ottawa that most tourists miss.

  • Reserve your vehicle from Ottawa Gatineau Airport a few weeks before your trip to lock in the best possible deal. If you're going away during a busy period, it's a good idea to book your Seattle to Ottawa flight even earlier.

Ottawa/Macdonald-Cartier International Airport (YOW)

  • Ottawa/Macdonald-Cartier International Airport (YOW) is about 11 kilometers from central Ottawa. Following your flight from Seattle to Ottawa, it takes approximately 20 minutes to reach the heart of the city in a ride-share or cab.

  • Traveling by public transport will take around 45 minutes.

  • Forget about inconvenient public transport schedules or long cab lines. Grab an Ottawa/Macdonald-Cartier International Airport rental car and blaze your own trail. Compare offers from Routes Car Rentals, Alamo and Budget.

  • Get the lowest price by securing your ride from YOW two weeks ahead of time. You can also expect to have a wider range of vehicles.

  • You can find Ottawa/Macdonald-Cartier International Airport at 50 Airport Road.

Best time to go to Ottawa

  • Have a think about your dates before locking in your flight from Seattle to Seattle. The city buzzes in peak season, but hotel prices are typically higher and top attractions can be busy. Go to Seattle in the low season if you want a quieter vibe.

  • Lock in a Seattle to Ottawa ticket departing in July if you're eager to experience the city during its warmest month. You can expect temperatures in Ottawa to range from 13ºC (55ºF) to 27ºC (81ºF).

  • Search for cheap flights from Seattle to Ottawa in January if you like traveling in cooler conditions. Temperatures are at their lowest then, ranging between -19ºC (-2ºF) and -2ºC (28ºF) on average.

More about Ottawa

  • After booking your flight from Seattle to Ottawa, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Ottawa:

  • Parliament Hill and Rideau Canal are just two of the popular attractions to put on your Ottawa itinerary. Continue your sightseeing adventures at National Gallery of Canada.

Explore more of Canada

  • Toronto is just one of the many places in Canada waiting to be discovered once you've seen Ottawa. Around 354 kilometers to the south-west, popular attractions include CN Tower, Royal Ontario Museum and Go Tours Canada - Distillery District.

  • Montreal is another essential stop in Canada and is around 153 kilometers east of Ottawa. No journey is complete without visiting Mount Royal Park, Montreal Botanical Garden and Saint Joseph's Oratory of Mount Royal.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.