C$188 Cheap Flights from Kitchener / Waterloo (YKF) to Seattle (SEAA)

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Flight deals from Kitchener / Waterloo to Seattle

Looking for a cheap last-minute deal or the best return flight from Kitchener / Waterloo Airport to Seattle? If you want to travel next month, return fares start from C$343. Find the lowest prices on one-way and return tickets right here.

Seattle.C$188 per passenger.Departing Fri., Jun. 19.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Fri., Jun. 19, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$188, select.

Seattle.C$197 per passenger.Departing Fri., May 8.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Fri., May 8, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$197, select.

Seattle.C$259 per passenger.Departing Sun., Apr. 26.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Sun., Apr. 26, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$259, select.

Seattle.C$268 per passenger.Departing Mon., Sep. 28.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Mon., Sep. 28, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$268, select.

Seattle.C$278 per passenger.Departing Mon., Jul. 27.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Mon., Jul. 27, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$278, select.

Seattle.C$296 per passenger.Departing Thu., Aug. 27.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Thu., Aug. 27, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$296, select.

Seattle.C$298 per passenger.Departing Mon., Oct. 5.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Mon., Oct. 5, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$298, select.

Seattle.C$489 per passenger.Departing Mon., Jan. 11.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Mon., Jan. 11, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$489, select.

Seattle.C$504 per passenger.Departing Tue., Dec. 15.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Tue., Dec. 15, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$504, select.

Seattle.C$538 per passenger.Departing Mon., Feb. 8.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Mon., Feb. 8, arriving in Seattle / Tacoma International.Price includes taxes and charges.From C$538, select.

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

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

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Alternative Kitchener / Waterloo to Seattle routes

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

Toronto to Seattle: Flight information

The things to know before you go.

Cheapest flight found	C$188
Cheapest month to fly	June

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

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are return flights from Kitchener / Waterloo to Seattle?

The best price we found for a return flight from Kitchener / Waterloo to Seattle is C$331. 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.

Which airlines fly direct from Kitchener / Waterloo to Seattle?

Currently, there are no airlines that fly direct from Kitchener / Waterloo to Seattle. But we found flights with one or more stops from C$331.

How many flights are there a week from Kitchener / Waterloo to Seattle?

As of April 2026, there are no flights flying from Kitchener / Waterloo to Seattle.

When is the cheapest time to fly from Kitchener / Waterloo to Seattle?

The cheapest month to fly from Kitchener / Waterloo to Seattle is usually June.

Which is the cheapest airport to fly into in Seattle?

If you're flying from Kitchener / Waterloo 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$331.

Which upcoming date is cheapest to fly from Kitchener / Waterloo Airport to Seattle on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kitchener / Waterloo Airport to Seattle on Monday, June 1, 2026.

Can I get a direct flight from Kitchener / Waterloo Airport to Seattle?

No airlines currently offer direct flights between Kitchener / Waterloo Airport and Seattle. Most routes have one or more stops.

How can I get the best flight deal from Kitchener / Waterloo Airport to Seattle?

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.

When is the best time to book flights to Seattle?

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.

What’s the weather like in Seattle?

In April, the average temperature is usually around 8°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.

Which is the cheapest airline to fly from Kitchener / Waterloo Airport to Seattle with?

Currently, WestJet offers the cheapest flight tickets to Seattle.

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

The timezone in Seattle is UTC-7. The city is 3 hours behind Toronto, where Region of Waterloo International Airport is located.
For stress-free travel, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This ensures you have enough time to board your flight from YKF to Seattle.
Travelling over a peak time such as August? Public holidays and other popular seasons can mean longer queues and delays at security. Play it safe and get there up to four hours before international flights and two hours before domestic departures.
If you have a passport from Canada and plan to travel to United States for tourism purposes, you won't need a visa. However, entry and visa requirements may vary based on the duration of your stay and are subject to change. For the latest rules, check with your destination's nearest embassy or consulate before booking a cheap ticket from Region of Waterloo International Airport to Seattle.
Located around 105 kilometres from central Toronto, YKF can be reached in about 1 hour and 13 minutes by car, depending on traffic. The same journey by public transport takes roughly 4 hours and 5 minutes.
Searching for a convenient hotel near YKF? If you've booked an early flight from Region of Waterloo International Airport to Seattle, these stays will have you moments from check-in:

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

C$188 is the cheapest price we've seen for a one-way ticket from Region of Waterloo International Airport to Seattle. For a return flight on this route, the best price is C$331. Depending on how early you book and the availability, these fares may change.
It's a good idea to book ahead of time if you're looking for cheap tickets from YKF to Seattle. That's because airlines change prices based on demand, which tends to rise closer to the date of departure.
Finding cheap tickets from Region of Waterloo International Airport to Seattle is easy if you can be flexible with your travel dates. Use the 'Whole month' search function to show the lowest fares across each month and score a great deal.
Log into your online account or use the app to create a Price Alert. We'll notify you straight away if there's a cheaper deal on this route. It's easy to do, and it'll save you time checking for cheap tickets from YKF to Seattle every day.
Take advantage of the filters to find your ideal trip. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Region of Waterloo International Airport to Seattle, use the 'Sort by' tool. You can also filter results by airline, departure and arrival times, and number of stops.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA) to the centre of Seattle takes about 18 minutes by car. It's approximately 23 kilometres away.
Getting to the centre by public transport will take you roughly 54 minutes.
The last thing you need is a lengthy journey to your hotel if you're arriving on a late flight from Region of Waterloo International Airport to Seattle. Check in to one of these accommodation options near SEA instead:

Lake Union Sea Plane Base Airport (LKE)

The centre of Seattle is about 3 kilometres from Lake Union Sea Plane Base Airport (LKE). Once your flight from Region of Waterloo International Airport to Seattle has hit the runway and you've made your way through the terminal, the drive should be around 11 minutes.
Travelling by public transport will take about 23 minutes.
After your flight from YKF to Seattle, kick back at a hotel near LKE. These are some great accommodation options that'll help you slip into relaxation mode:

Best time to go to Seattle

July is the most popular month to board a flight from Region of Waterloo International Airport to Seattle while May is the quietest. To work out the best time to visit Seattle, consider whether you like a lively atmosphere or a quieter vibe.
Before you book a flight from Region of Waterloo International Airport to Seattle, think about the type of weather you enjoy. August is the warmest month in Seattle, with temperatures ranging from 12ºC to 28ºC.
February has average temperatures of between -1ºC and 11ºC. Search for cheap flights from YKF to Seattle sometime around then if you like cooler conditions.

More about Seattle

When it comes to looking for somewhere to lay your head, you'll find the most popular stays in Seattle right here. Browse these options after locking in your flight from Region of Waterloo International Airport to Seattle:
There are so many things to discover in this city it can be tricky to know where to start. Gas Works - Lake View Point, Queen Anne Bowl Playfield and LMN Architects are leading attractions which should feature on any well-planned Seattle itinerary.

Complete your Seattle trip with a car rental

Pick one of our car rentals in Seattle and explore the city in your own time. Easily compare companies in one go to find the perfect set of wheels once you've locked in your hotel and cheap flights from Region of Waterloo International Airport to Seattle.