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Cheap Flights from Ottawa (YOWA) to Seattle (SEAA)

Compare Ottawa to Seattle flight deals

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Flight deals from Ottawa to Seattle

Looking for a cheap last-minute deal or the best return flight from Ottawa to Seattle? If you want to travel next month, return fares start from £256. Find the lowest prices on one-way and return tickets right here.
Seattle.£221 per passenger.Departing Mon, 27 Apr, returning Mon, 4 May.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Mon, 27 Apr, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Mon, 4 May, arriving in Ottawa International.Price includes taxes and charges.From £221, select.
Seattle.£226 per passenger.Departing Sat, 6 Jun, returning Sat, 13 Jun.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sat, 6 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sat, 13 Jun, arriving in Ottawa International.Price includes taxes and charges.From £226, select.
Seattle.£227 per passenger.Departing Wed, 6 May, returning Tue, 19 May.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 6 May, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Tue, 19 May, arriving in Ottawa International.Price includes taxes and charges.From £227, select.
Seattle.£256 per passenger.Departing Sun, 19 Apr, returning Sun, 26 Apr.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sun, 19 Apr, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sun, 26 Apr, arriving in Ottawa International.Price includes taxes and charges.From £256, select.
Seattle.£316 per passenger.Departing Fri, 26 Jun, returning Sat, 4 Jul.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Fri, 26 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sat, 4 Jul, arriving in Ottawa International.Price includes taxes and charges.From £316, select.
Seattle.£421 per passenger.Departing Tue, 24 Mar, returning Fri, 27 Mar.Return flight with United.Outbound indirect flight with United, departs from Ottawa International on Tue, 24 Mar, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departs from Seattle / Tacoma International on Fri, 27 Mar, arriving in Ottawa International.Price includes taxes and charges.From £421, select.
Seattle.£435 per passenger.Departing Thu, 22 Oct, returning Tue, 27 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Thu, 22 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 27 Oct, arriving in Ottawa International.Price includes taxes and charges.From £435, select.
Seattle.£437 per passenger.Departing Tue, 15 Sep, returning Tue, 22 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Tue, 15 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 22 Sep, arriving in Ottawa International.Price includes taxes and charges.From £437, select.
Seattle.£437 per passenger.Departing Tue, 21 Jul, returning Tue, 21 Jul.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Tue, 21 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 21 Jul, arriving in Ottawa International.Price includes taxes and charges.From £437, select.

Find the cheapest month to fly from Ottawa to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa to Seattle flights are currently cheapest in June.
Mar
from £421
Apr
from £256
May
from £227
Jun
from £226
Jul
from £437
Aug
Find prices
Sep
from £437
Oct
from £435
Nov
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Dec
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Jan
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Feb
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Alternative Ottawa to Seattle routes

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

Seattle Lake Union SPB

1 mile from central Seattle
Closest
Search flights

Seattle Boeing Fld

7 miles from central Seattle
from £830
Search flights

Seattle / Tacoma International

12 miles from central Seattle
Cheapest
from £221
Search flights

Paine Field

20 miles from central Seattle
from £392
Search flights

Ottawa to Seattle: Flight information

The things to know before you go.
Cheapest flight found£221
Cheapest month to flyApril

Finding cheap flights from Ottawa 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 to Seattle is £221. 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 to Seattle. But we found flights with one or more stops from £221.
As of March 2026, there are no flights flying from Ottawa to Seattle.
The cheapest month to fly from Ottawa to Seattle is usually April.
If you're flying from Ottawa, the cheapest airport near Seattle is Seattle / Tacoma International – which is 12.1 miles away from the centre of Seattle. We've found flights into this airport from £221.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa to Seattle on Monday, 27 April 2026.
No airlines currently offer direct flights between Ottawa 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 March, the average temperature is usually around 6°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.
The cheapest airline that flies to Seattle is WestJet .

Flying from Ottawa to Seattle: what you need to know

  • Planning your trip begins with figuring out where you'll fly out of in Ottawa. Ottawa/Macdonald-Cartier International Airport (YOW) is the city's main airport, so explore your options for reserving a flight from Ottawa to Seattle taking off from here.

  • Seattle-Tacoma International Airport (SEA) and Lake Union Sea Plane Base Airport (LKE) are Seattle's chief entry points.

  • For hassle-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. That way, you can comfortably board your Ottawa to Seattle flight.

  • Planning to travel during a peak time like school or public holidays? Expect longer queues at check-in and security. To be on the safe side, arrive up to four hours before international flights and two hours ahead of domestic departures.

How to find the cheapest flights from Ottawa to Seattle

  • To pick up cheap Ottawa to Seattle flights, book as early as you can. Airlines tend to offer their most competitively priced fares when flights first go on sale.

  • Getting cheap plane tickets from Ottawa to Seattle is more likely if you're flexible with your travel dates. Try using the 'Whole month' tool to see the lowest fares across every month and walk away with a great deal.

  • Cut down on the time spent looking for cheap flights from Ottawa to Seattle by setting up a Price Alert. We'll send you an email or notification through the app when fares go down.

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

Flying from Ottawa

Ottawa/Macdonald-Cartier International Airport (YOW)

  • The journey from central Ottawa to YOW takes about 45 minutes on public transport. If you ride-share, drive or take a cab, you'll cover the 11 kms (7 miles) in 20 minutes or so, depending on traffic conditions.

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

  • 58.21% of flights departing from Ottawa/Macdonald-Cartier International Airport arrive at their destination on schedule.

  • YOW's address is 50 Airport Road.

Arriving in Seattle

Seattle-Tacoma International Airport (SEA)

  • The distance from Seattle-Tacoma International Airport (SEA) to central Seattle is approximately 19 kms (12 miles). It takes around 20 minutes to get to the centre driving.

  • It typically takes 55 minutes to get there on public transport.

  • Book a hotel close to SEA if you have a late flight from Ottawa to Seattle. Pick one of these options and avoid the hassle of a long transfer:

  • Pick up a Seattle-Tacoma International Airport rental car and discover Seattle and beyond with your own wheels. Thrifty, Europcar and Budget are top providers you can book with here.

  • To secure the lowest price, reserve your vehicle from Seattle-Tacoma International Airport about one week ahead of your Ottawa to Seattle flight.

Lake Union Sea Plane Base Airport (LKE)

  • Lake Union Sea Plane Base Airport (LKE) is about 3 kms (2 miles) from the centre of Seattle. After your flight from Ottawa to Seattle, it takes approximately 10 minutes to get to the heart of the city in a cab or ride-share.

  • If you hop on public transport, you'll get to the city centre in 25 minutes or so.

  • There are some comfortable places to call home for the night near LKE. Settle in and get cosy after your Ottawa to Seattle flight at one of these perfectly located options:

Best time to go to Seattle

  • May is the quietest month for flights from Ottawa to Seattle, while July is the busiest. Work out the ideal time to go to Seattle based on whether you want a laid-back vibe or a more bustling atmosphere.

  • When booking your Ottawa to Seattle tickets, think about what kind of weather you prefer. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • If you like travelling in cooler conditions, look for a cheap flight from Ottawa to Seattle in February when temperatures average between -1ºC (30ºF) and 11ºC (52ºF).

More about Seattle

Explore more of United States

  • You've seen Seattle, now it's time to discover other parts of United States. Journey around 150 miles south to Portland to tick off its must-visit sights. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, your itinerary will be busy.

  • If you're eager to discover another major stop in United States, consider Spokane, about 230 miles east of Seattle. Manito Park, Northwest Museum of Arts & Culture and Spokane Falls are key reasons to visit.

Plan the rest of your trip from Ottawa to Seattle

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