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304 € Cheap Flights from Ottawa International to Seattle / Tacoma International

Compare Ottawa International to Seattle / Tacoma International flight deals

Find the cheapest month or even day of the year to fly to Seattle / Tacoma International

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Flight deals from Ottawa International to Seattle / Tacoma International

Looking for a cheap last-minute deal or the best return flight from Ottawa International Airport to Seattle / Tacoma International Airport? If you want to travel next month, return fares start from 460 €. Find the lowest prices on one-way and return tickets right here.
Seattle.304 € per passenger.Departing Fri, 4 Sep, returning Sat, 19 Sep.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Fri, 4 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sat, 19 Sep, arriving in Ottawa International.Price includes taxes and charges.From 304 €, select.
Seattle.321 € per passenger.Departing Sat, 26 Sep, returning Fri, 2 Oct.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sat, 26 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Fri, 2 Oct, arriving in Ottawa International.Price includes taxes and charges.From 321 €, select.
Seattle.350 € per passenger.Departing Sun, 11 Oct, returning Mon, 19 Oct.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sun, 11 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Mon, 19 Oct, arriving in Ottawa International.Price includes taxes and charges.From 350 €, select.
Seattle.396 € per passenger.Departing Sat, 15 Aug, returning Sat, 22 Aug.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sat, 15 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sat, 22 Aug, arriving in Ottawa International.Price includes taxes and charges.From 396 €, select.
Seattle.397 € per passenger.Departing Fri, 10 Jul, returning Fri, 24 Jul.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Fri, 10 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Fri, 24 Jul, arriving in Ottawa International.Price includes taxes and charges.From 397 €, select.
Seattle.422 € per passenger.Departing Sat, 25 Jul, returning Sat, 29 Aug.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sat, 25 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sat, 29 Aug, arriving in Ottawa International.Price includes taxes and charges.From 422 €, select.
Seattle.456 € per passenger.Departing Tue, 1 Dec, returning Sat, 9 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Tue, 1 Dec, arriving in Seattle / Tacoma International.Inbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Sat, 9 Jan, arriving in Ottawa International.Price includes taxes and charges.From 456 €, select.
Seattle.460 € per passenger.Departing Sat, 13 Jun, returning Sat, 20 Jun.Return flight with WestJet and Alaska Airlines.Outbound indirect flight with WestJet, departs from Ottawa International on Sat, 13 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Sat, 20 Jun, arriving in Ottawa International.Price includes taxes and charges.From 460 €, select.
Seattle.461 € per passenger.Departing Sun, 28 Jun, returning Wed, 1 Jul.Return flight with Porter Airlines and WestJet.Outbound indirect flight with Porter Airlines, departs from Ottawa International on Sun, 28 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Wed, 1 Jul, arriving in Ottawa International.Price includes taxes and charges.From 461 €, select.

Find the cheapest month to fly from Ottawa International to Seattle / Tacoma International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa International to Seattle / Tacoma International flights are currently cheapest in September.
May
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Jun
from 460 €
Jul
from 397 €
Aug
from 396 €
Sep
from 304 €
Oct
from 350 €
Nov
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Dec
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Jan
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Feb
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Mar
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Apr
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Ottawa International to Seattle / Tacoma International: Alternative routes

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

Seattle Lake Union SPB

2km from central Seattle
Closest
from 496 €
Search flights

Seattle Boeing Fld

11km from central Seattle
from 919 €
Search flights

Seattle / Tacoma International

20km from central Seattle
Cheapest
from 304 €
Search flights

Paine Field

33km from central Seattle
from 559 €
Search flights

Ottawa to Seattle: Flight information

The things to know before you go.
Cheapest flight found304 €
Cheapest month to flySeptember

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

The best price we found for a return flight from Ottawa International to Seattle / Tacoma International is 304 €. 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 / Tacoma International. But we found flights with one or more stops from 304 €.
As of May 2026, there are no flights flying from Ottawa International to Seattle / Tacoma International.
The cheapest month to fly from Ottawa International to Seattle / Tacoma International is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to Seattle / Tacoma International Airport on Friday, 4 September 2026.
No airlines currently offer direct flights between Ottawa International Airport and Seattle / Tacoma 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 Seattle / Tacoma 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 Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, WestJet offers the cheapest flight tickets to Seattle / Tacoma International.

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

  • Seattle's timezone is UTC-7, making Seattle three hours behind Ottawa.

  • Your YOW to SEA flight won't wait if you're late, so get to the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • During popular months such as July, you'll want to get to the airport even earlier. Arrive two hours before domestic departures and four hours ahead of international flights when you travel during peak periods in general.

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

  • 168 € is the lowest price for a one-way Ottawa/Macdonald-Cartier International Airport to Seattle-Tacoma International Airport flight. Return flights start at 304 €. These prices can change depending on demand.

  • It's often best to book as early as possible if you're hoping to get cheap tickets from YOW to SEA. That's because flight prices are based on demand, which tends to increase closer to departure.

  • If you're flexible with your travel plans, try using the 'Whole month' search tool. It'll show you the lowest price in each month when looking for a flight from Ottawa/Macdonald-Cartier International Airport to Seattle-Tacoma International Airport.

  • Picking up cheap flights from YOW to SEA is a piece of cake with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as a new deal comes up.

  • Choose your ideal departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Ottawa/Macdonald-Cartier International Airport to Seattle-Tacoma International Airport.

Handy information about Ottawa/Macdonald-Cartier International Airport (YOW)

  • YOW is located at 50 Airport Road.

  • 58.21% of flights departing from Ottawa/Macdonald-Cartier International Airport touch down at their destination on time.

  • To get to Ottawa/Macdonald-Cartier International Airport from central Ottawa, it takes about 20 minutes if you're going by car. This depends on traffic though. It's approximately 13 kilometres from the airport to the city centre.

  • The journey when using public transport typically takes 45 minutes.

  • Need a handy hotel near YOW? If you've booked an early flight from Ottawa/Macdonald-Cartier International Airport to Seattle-Tacoma International Airport, these accommodation options will put you moments from your departure lounge:

Arriving at Seattle-Tacoma International Airport (SEA)

Getting from Seattle-Tacoma International Airport (SEA) to central Seattle

  • From Seattle-Tacoma International Airport, Seattle is approximately 23 kilometres away. It takes around 20 minutes to drive to the centre.

  • It'll take around 55 minutes to get there using public transport.

When to fly to Seattle-Tacoma International Airport (SEA)

  • It's time to plan your trip dates for your flight from Ottawa/Macdonald-Cartier International Airport to Seattle-Tacoma International Airport. July is the most popular month to visit Seattle. If you'd like a more relaxed vibe, go in May.

  • The warmest month in Seattle is August, with the temperature ranging between 12ºC (54ºF) and 28ºC (82ºF). Book your flights from Ottawa/Macdonald-Cartier International Airport to Seattle-Tacoma International Airport in this month if this is the type of weather you enjoy.

  • Search for cheap tickets from YOW to SEA in February if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -1ºC (30ºF) and 11ºC (52ºF) on average.

Explore more of United States

  • Portland is just one of the many places in United States waiting to be explored after you've experienced Seattle. Around 241 kilometres away to the south, top sights here include Pioneer Courthouse Square, Portland Japanese Garden and Pittock Mansion.

  • Spokane is another well-known destination in United States and is around 370 kilometres east of Seattle. No trip is complete without experiencing Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.

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