Cheap Flights from Kitchener / Waterloo to Seattle / Tacoma International

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Compare Kitchener / Waterloo to Seattle / Tacoma International flight deals

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Flight deals from Kitchener / Waterloo to Seattle / Tacoma International

Looking for a cheap last-minute deal or the best return flight from Kitchener / Waterloo to Seattle / Tacoma International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Kitchener / Waterloo to Seattle / Tacoma International

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

Kitchener / Waterloo to Seattle / Tacoma International: Alternative routes

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

Toronto to Seattle: Flight information

The things to know before you go.
Cheapest flight found201 €
Cheapest month to flySeptember

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

The best price we found for a return flight from Kitchener / Waterloo to Seattle / Tacoma International is 201 €. 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 Kitchener / Waterloo to Seattle / Tacoma International. But we found flights with one or more stops from 201 €.
As of May 2025, there are no flights flying from Kitchener / Waterloo to Seattle / Tacoma International.
The cheapest month to fly from Kitchener / Waterloo to Seattle / Tacoma International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kitchener / Waterloo Airport to Seattle / Tacoma International Airport on Tuesday, 16 September 2025.
No airlines currently offer direct flights between Kitchener / Waterloo 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.

Travelling from Region of Waterloo International Airport (YKF) to Seattle-Tacoma International Airport (SEA): what you need to know

  • The timezone in Seattle is UTC-7, which is three hours behind Toronto.

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

  • During popular months such as August, you'll want to get to the airport well in advance. Arrive two hours before a domestic departure and four hours ahead for an international flight when you fly during a high season in general.

How to find the cheapest flights from Region of Waterloo International Airport (YKF) to Seattle-Tacoma International Airport (SEA)

  • The cheapest price we've found for a one-way Region of Waterloo International Airport to Seattle-Tacoma International Airport flight is 112 €. A return ticket is currently 201 €. Depending on the availability when you book, these fares could change.

  • Don't wait until the last minute. You're more likely to get cheap tickets from YKF to SEA if you book ahead. Airlines often offer some great early bird discounts.

  • If you're willing to be flexible with your trip dates, use the 'Whole month' search tool. It'll find the cheapest price across the month when looking for your flight from Region of Waterloo International Airport to Seattle-Tacoma International Airport.

  • You won't have to check back in every day to see if fares have gone down when you set up a Price Alert. We'll let you know the moment there's a better deal on cheap flights from YKF to SEA.

  • Tailor your trip using filters. Select your preferred departure and arrival times, total journey duration and airlines. You can also sort results by 'Cheapest,' 'Best' or 'Fastest' flights from Region of Waterloo International Airport to Seattle-Tacoma International Airport.

Handy information about Region of Waterloo International Airport (YKF)

  • When it comes to the on-time performance of Region of Waterloo International Airport, data shows 63.64% of flights complete their journey on time.

  • Central Toronto to Region of Waterloo International Airport is around 105 kilometres. Depending on traffic, it'll take about 1 hour 15 minutes to get there if you're driving, catching a cab or ride-sharing.

  • Planning to catch public transport? Expect a trip time of around 4 hours 5 minutes.

  • Catching an early flight from Region of Waterloo International Airport to Seattle-Tacoma International Airport? Avoid the last-minute rush to the terminal (and get some extra shut-eye) by picking one of these hotels near YKF:

Arriving at Seattle-Tacoma International Airport (SEA)

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

  • Seattle-Tacoma International Airport to the centre of Seattle has a drive time of about 20 minutes. It's approximately 23 kilometres away.

  • It takes roughly 55 minutes if you're travelling on public transport.

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

  • The quietest month for a flight from Region of Waterloo International Airport to Seattle-Tacoma International Airport is May, while July is the busiest. Choose the ideal time to go to Seattle based on whether you prefer a more fast-paced or easygoing experience.

  • Before locking in your flight from Region of Waterloo International Airport to Seattle-Tacoma International Airport, think about the kind of weather you enjoy. August is the warmest month in Seattle, with the temperature ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • February sees average temperatures of between -1ºC (30ºF) and 11ºC (52ºF). Search for cheap tickets from YKF to SEA sometime then if you like travelling in cooler conditions.

Explore more of United States

  • You've seen Seattle, now it's time to explore more of United States. Journey about 241 kilometres south to Portland to tick off its leading sights. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, you've got a jam-packed schedule ahead.

  • Around 370 kilometres east of Seattle, Spokane is another essential stop in United States. Experience this destination's highlights firsthand at 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.