C$192 Cheap Flights from Ottawa International to Seattle

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Flight deals from Ottawa International to Seattle

Looking for a cheap last-minute deal or the best round-trip flight from Ottawa International to Seattle? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Ottawa International to Seattle

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

Ottawa to Seattle: Flight information

The things to know before you go.
Cheapest flight foundC$192
Cheapest month to flyApril

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

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Ottawa International to Seattle is C$372. 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 Ottawa International to Seattle. But we found flights with one or more stops from C$372.
As of February 2026, there are no flights flying from Ottawa International to Seattle.
The cheapest month to fly from Ottawa International to Seattle is usually May.
If you're flying from Ottawa International Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from C$372.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to Seattle on Saturday, May 23, 2026.
No airlines currently offer direct flights between Ottawa International Airport and Seattle. 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 Seattle 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 Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 4°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, WestJet offers the cheapest flight tickets to Seattle.

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

  • Seattle is 3 hours behind Ottawa, where Ottawa/Macdonald-Cartier International Airport is located. Seattle operates on the UTC-7 timezone.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This way, you can comfortably board your flight from YOW to Seattle.

  • You'll likely experience longer queues in popular months like August and other peak seasons. Arriving up to four hours in advance for an international flight and two hours for a domestic departure is a smart move.

  • You can enter United States for tourism purposes without a visa if you have a passport from Canada. But before booking your flight tickets from Ottawa/Macdonald-Cartier International Airport to Seattle, make sure you're up to date with the latest guidelines. Visa rules are subject to change, and you may need some documentation if your trip is for work or another reason.

  • The journey from central Ottawa to YOW takes approximately 43 minutes on public transport. If you ride-share, drive or get a cab, you'll cover the 13 kilometres in 19 minutes or so, depending on traffic.

  • Want a leisurely start to your break? Stay near YOW. Whether you're taking an early flight from Ottawa/Macdonald-Cartier International Airport to Seattle or just don't want to be rushed, these hotels have you covered:

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

  • The best price we've found for a one-way ticket from Ottawa/Macdonald-Cartier International Airport to Seattle is C$192. The cheapest price for a return flight is C$372. Bear in mind fares may change due to demand at the time of booking.

  • It's often best to book in advance if you're hoping to get cheap tickets from YOW to Seattle. That's because airlines adjust prices based on demand, which tends to rise closer to the departure date.

  • Finding cheap tickets from Ottawa/Macdonald-Cartier International Airport to Seattle is easy if you can be flexible with your trip dates. Check out the 'Whole month' search tool to see the lowest fares across each month and snap up a great deal.

  • Set up a Price Alert for cheap tickets from YOW to Seattle. You don't need to look every day to see whether fares have dropped. We'll notify you the moment there's a change in price.

  • Tailor your travel plans with filters. Choose your ideal arrival and departure times, total journey duration and airlines. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best' flights from Ottawa/Macdonald-Cartier International Airport to Seattle.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) to central Seattle is approximately 23 kilometres. It takes about 18 minutes to reach the centre driving.

  • It typically takes 54 minutes when travelling by public transport.

  • Book a hotel close to SEA if you're catching a late flight from Ottawa/Macdonald-Cartier International Airport to Seattle. Select one of these options and avoid the hassle of a long transfer:

Lake Union Sea Plane Base Airport (LKE)

Best time to go to Seattle

  • It's time to pick your trip dates for your flight from Ottawa/Macdonald-Cartier International Airport to Seattle. July is the busiest month to visit Seattle. If you like a more low-key vibe, go in May.

  • The warmest month in Seattle is August, with the temperature ranging between 12ºC and 28ºC. Book your flights from Ottawa/Macdonald-Cartier International Airport to Seattle in this month if you enjoy this type of weather.

  • February has average temperatures of between -1ºC and 11ºC. Look for cheap flights from YOW to Seattle sometime around then if you want to travel in cooler conditions.

More about Seattle

  • When it comes to searching for somewhere to lay your head, you'll find the best stays in Seattle right here. Explore these options as soon as you've locked in your flight from Ottawa/Macdonald-Cartier International Airport to Seattle:

  • Gas Works - Lake View Point and Queen Anne Bowl Playfield are just two of the leading attractions to put on your Seattle itinerary. Continue your sightseeing adventures at LMN Architects.

Complete your Seattle trip with a car rental

  • Finding you a cheap flight from Ottawa/Macdonald-Cartier International Airport to Seattle isn't our only cool trick. Check out our car rentals in Seattle and explore at your own pace. We find deals from trusted car rental providers and put them all in one place. You can instantly compare rates and then book with no fees.

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