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Cheap flight tickets 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

Looking for a cheap last-minute deal or the best return flight from Seattle to Ottawa International? Find the lowest prices on one-way and return tickets right here.
Ottawa.RM1,466 per passenger.Departing Tue, 21 Apr, returning Tue, 28 Apr.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 21 Apr, arriving in Ottawa International.Inbound indirect flight with Air Canada, departs from Ottawa International on Tue, 28 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From RM1,466, select.
Ottawa.RM1,542 per passenger.Departing Thu, 14 May, returning Wed, 20 May.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Thu, 14 May, arriving in Ottawa International.Inbound indirect flight with Air Canada, departs from Ottawa International on Wed, 20 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From RM1,542, select.
Ottawa.RM1,591 per passenger.Departing Sat, 13 Jun, returning Mon, 15 Jun.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sat, 13 Jun, arriving in Ottawa International.Inbound indirect flight with WestJet, departs from Ottawa International on Mon, 15 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From RM1,591, select.
Ottawa.RM1,752 per passenger.Departing Wed, 16 Sep, returning Wed, 30 Sep.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Wed, 16 Sep, arriving in Ottawa International.Inbound indirect flight with WestJet, departs from Ottawa International on Wed, 30 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From RM1,752, select.
Ottawa.RM2,299 per passenger.Departing Thu, 5 Mar, returning Sun, 8 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Thu, 5 Mar, arriving in Ottawa International.Inbound indirect flight with Air Canada, departs from Ottawa International on Sun, 8 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From RM2,299, select.

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 April.
Feb
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Mar
from RM2,301
Apr
from RM1,467
May
from RM1,544
Jun
from RM1,593
Jul
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Aug
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Sep
from RM1,754
Oct
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Nov
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Dec
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Jan
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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.

Ottawa International

11km from central Ottawa
ClosestCheapest
from RM1,466
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Ottawa Gatineau

15km from central Ottawa
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Seattle to Ottawa: Flight information

The things to know before you go.
Cheapest flight foundRM1,467
Cheapest month to flyApril

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 RM1,467. 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 RM1,467.
As of February 2026, there are no flights flying from Seattle to Ottawa International.
The cheapest month to fly from Seattle to Ottawa International is usually April.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Ottawa International Airport on Tuesday, 21 April 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 Air Canada .

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

  • Seattle has a couple of airports where you can start your adventure. Explore your options for reserving a flight from Seattle to Ottawa/Macdonald-Cartier International Airport (YOW) departing from Seattle-Tacoma International Airport (SEA) or Lake Union Sea Plane Base Airport (LKE).

  • Ottawa is three hours ahead of Seattle. Ottawa/Macdonald-Cartier International Airport is located in Ottawa, which follows the UTC-4 timezone.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Be at the airport on time to catch your flight from Seattle to YOW.

  • If you're travelling during a major holiday or other peak period, allow for even more time. Arrive two hours before domestic flights and up to four hours before international departures. Queues at security and check-in will be longer.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Think about adding a stopover to find cheap flights from Seattle to YOW. Just uncheck 'Direct flights only' when browsing departures from Seattle-Tacoma International Airport (SEA). Break up your trip (and maybe get a better deal) by stopping at one of these popular airports:

    • 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 20 minutes by car (depending on traffic). The journey on public transport takes roughly 55 minutes.

  • In search of a convenient hotel near Seattle-Tacoma International Airport? If you're catching an early flight from Seattle to Ottawa/Macdonald-Cartier International Airport, these stays will put you moments from your check-in counter:

  • 81.27% of flights departing from Seattle-Tacoma International Airport reach their destination on schedule. Given its strong performance rating, you're unlikely to experience delays when flying out of SEA.

Lake Union Sea Plane Base Airport (LKE)

  • LKE is about 3 kilometres from central Seattle. It'll take you 10 minutes or so to get to the airport in a car from the city centre. Public transport takes roughly 25 minutes.

  • Start your holiday early with an additional night away from home. Before catching your Seattle to YOW flight, unwind in one of these hotels near Lake Union Sea Plane Base Airport:

About Ottawa/Macdonald-Cartier International Airport (YOW)

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

  • Ottawa/Macdonald-Cartier International Airport is around 11 kilometres from central Ottawa. The time it takes to get to the centre in a car hire or cab depends on the time of day. Do some research before your trip.

  • It typically takes 45 minutes when travelling by public transport.

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

  • Right now, RM638 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 RM1,466. Remember fares can change due to availability at the time of booking.

  • To pick up cheap flights from Seattle to YOW, book ahead. Airlines generally offer the most competitive fares when flights are first released.

  • Cheap Seattle to Ottawa/Macdonald-Cartier International Airport tickets are easier to find if your travel dates are flexible. Try using the 'Whole month' tool to compare fares across each month and then choose the cheapest day.

  • Never miss a deal on plane tickets from Seattle to YOW by setting up a Price Alert. We'll send you an email or notification on the app when a lower fare pops up.

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

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

  • February is the quietest month for flights from Seattle to Ottawa/Macdonald-Cartier International Airport (YOW), while August is the busiest. Choose the ideal time to visit Ottawa based on whether you like a laid-back vibe or a lively atmosphere.

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

  • Search for cheap tickets from Seattle to Ottawa/Macdonald-Cartier International Airport in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between -19ºC (-2ºF) and -2ºC (28ºF).

More about Ottawa

  • Start your Ottawa trip right by choosing the perfect place to stay. After booking your flight from Seattle to Ottawa/Macdonald-Cartier International Airport, browse our selection of hotels including:

  • Your visit to Ottawa isn't complete without checking out the sights. Big-name attractions you won't want to miss include Rideau Canal National Historic Site, Parliament Hill and Rideau Canal, Locks 1 - 8 - Ottawa.

Explore more of Canada

  • Ottawa has plenty to offer, but there are so many other parts of Canada you should also see. Around 153 kilometres east of Ottawa, a trip to Montreal will keep your itinerary packed. Start with popular sights like Cirque du Soleil - KURIOS, Montreal Botanical Garden and Saint Joseph's Oratory of Mount Royal.

  • If you're looking to explore another major stop in Canada, consider Laval, about 153 kilometres east of Ottawa. Le Cosmodôme, SkyVenture Montréal and illumi Laval are key reasons to visit.

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