Cheap flights from Seattle to Ottawa International

Compare Seattle to Ottawa International flight deals

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

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Flight deals from Seattle to Ottawa International Airport

Looking for a cheap last-minute deal or the best return flight from Seattle to Ottawa International Airport? If you want to travel next month, return fares start from $610. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle to Ottawa International

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

Seattle to Ottawa International: Alternative routes

Compare routes from Seattle to Ottawa below. You may find an airport to fly into that's cheaper, faster, or easier than Ottawa International.

Seattle to Ottawa: Flight information

The things to know before you go.
Cheapest flight found$247
Cheapest month to flyJune

Finding cheap flights from Seattle to Ottawa International: Frequently asked questions

The best price we found for a return flight from Seattle to Ottawa International is $562. 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 International. But we found flights with one stop from $562.
As of March 2026, there are no flights flying from Seattle to Ottawa International.
The cheapest month to fly from Seattle to Ottawa International is usually June.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Ottawa International Airport on Friday, 5 June 2026.
No airlines currently offer direct flights between Seattle and Ottawa International Airport. 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 International 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.
The cheapest airline that flies to Ottawa International is WestJet .

Flying from Seattle to Ottawa Macdonald-Cartier International Airport (YOW): What you need to know

  • Ottawa is three hours ahead of Seattle. Ottawa Macdonald-Cartier International Airport is located in Ottawa, which follows the UTC-5 timezone.

  • To ensure you get on your flight from Seattle to YOW, leave plenty of time to check in and find your gate. Turning up two hours before international departures and an hour before domestic flights is the general travel rule.

  • Hopping on a plane during a peak month like July? Popular periods (like Thanksgiving, Christmas and spring break) can easily add another hour at security. Be extra safe and arrive up to four hours before an international flight and two hours before a domestic departure.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • A stopover is the ideal opportunity to take a break from travelling and maybe even explore another city. When searching for cheap flights from Seattle to YOW leaving from Seattle-Tacoma International Airport (SEA), deselect the 'Direct flights only' box to get ideas for where to visit along the way. Here's where you could connect through:

    • Toronto Pearson International Airport (YYZ)

    • Vancouver International Airport (YVR)

    • Calgary International Airport (YYC)

  • Located around 23 kilometres from the centre of Seattle, SEA can be reached in about 25 minutes by car, depending on traffic. The journey on public transport will take roughly 35 minutes.

  • Catching an early flight from Seattle to Ottawa Macdonald-Cartier International Airport? Avoid the last-minute rush to the terminal (and get some bonus sleep) by choosing one of these hotels near Seattle-Tacoma International Airport:

  • Seattle-Tacoma International Airport has an excellent on-time record, so you're less likely to experience disruptions. Departures from SEA land on schedule 81% of the time.

Seattle Paine Field International Airport (PAE)

  • You can get to PAE from the centre of Seattle in about 40 minutes by car (depending on traffic conditions). The journey on public transport takes roughly 1 hour 30 minutes to travel the 40 kilometres or so.

  • Kick off your holiday early with an additional night away from home. Before your Seattle to YOW flight, kick back in one of these hotels near Seattle Paine Field International Airport:

  • Flights from Seattle Paine Field International Airport have a track record for punctuality, with 80% of them landing within the expected time frame.

About Ottawa Macdonald-Cartier International Airport (YOW)

Getting from Ottawa Macdonald-Cartier International Airport (YOW) to central Ottawa

  • Central Ottawa is around 14 kilometres from Ottawa Macdonald-Cartier International Airport and takes about 20 minutes to reach by car. See what your options are for heading into the city, whether that's with a taxi, car hire or ride-share.

  • If you're travelling on public transport, expect a journey of roughly 35 minutes.

How to find the cheapest flights from Seattle to Ottawa Macdonald-Cartier International Airport (YOW)

  • Right now, $247 is the lowest price we've found for a one-way ticket from Seattle to Ottawa Macdonald-Cartier International Airport. The cheapest price for a return flight is $562. Remember fares can change due to demand at the time of booking.

  • To pick up cheap flights from Seattle to YOW, book ahead. Airlines tend to offer their most competitively priced fares when tickets first go on sale.

  • The 'Whole month' search tool will show you the cheapest Seattle to Ottawa Macdonald-Cartier International Airport tickets across every month. It's an easy way to find a bargain if your trip dates aren't set in stone.

  • Locking in a cheap plane ticket from Seattle to YOW couldn't be easier with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch as soon as there's a better deal.

  • Filters make it easier to save some cash on your flight from Seattle to Ottawa Macdonald-Cartier International Airport. Pick the flight times, carriers and stops that look good to you. Then sort the results by 'Cheapest' to find the best price quickly.

The best time to fly from Seattle to Ottawa Macdonald-Cartier International Airport (YOW)

  • August is when most people book flights from Seattle to Ottawa Macdonald-Cartier International Airport (YOW). Plan your visit to Ottawa in November if you'd rather be there when it's quieter.

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

  • January sees temperatures of between -19ºC (-2ºF) and -2ºC (28ºF). Look for cheap tickets from Seattle to Ottawa Macdonald-Cartier International Airport around that time if you want to travel in cooler conditions.

More about Ottawa

  • Once you've booked your flight from Seattle to Ottawa Macdonald-Cartier International Airport, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Ottawa:

  • All great holidays should include some sightseeing. Rideau Canal National Historic Site, Parliament Hill and Rideau Canal, Locks 1 - 8 - Ottawa are must-visits when exploring Ottawa.

Explore more of Canada

  • Ottawa has plenty to offer, but there are so many other corners of Canada waiting to be discovered. Around 153 kilometres east of Ottawa, a trip to Montreal will keep you busy. Check out popular attractions like Cirque du Soleil - KURIOS, Montreal Botanical Garden and Saint Joseph's Oratory of Mount Royal.

  • If you're interested in discovering another great destination in Canada, head for Laval, about 153 kilometres east of Ottawa. Le Cosmodôme, SkyVenture Montréal and illumi Laval are the start of reasons to visit.

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