YKF - SEA

C$ 247 Find Cheap Flights from Toronto Region of Waterloo Intl to Seattle – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Region of Waterloo Intl to Seattle departing on 2/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
C$ 510
WestJet
Fri 18/9Sun 20/9
YKF - SEA • 1 stop
Cheapest one-way flights
C$ 247
WestJet
Mon 2/11
YKF - SEA • 1 stop
Direct flights
Not available
There are currently no direct flights between Region of Waterloo Intl and Seattle. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg C$ 356 (round-trip)
Shortest trip • 7h 58m (one-way)
Insights
Insights
Insights
Insights
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We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Region of Waterloo Intl to Seattle (YKF-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Region of Waterloo Intl to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Region of Waterloo Intl to Seattle

Fri, 18 Sep - Sun, 20 Sep
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:35 p.m. - 7:50 p.m.
SEA
-
YKF
21h 15m
1 stop
C$ 510WestJet
Wed, 22 Jul - Mon, 27 Jul
WestJet Logo
8:40 p.m. - 6:45 p.m.
YKF
-
SEA
25h 05m
1 stop
WestJet Logo
7:00 a.m. - 7:50 p.m.
SEA
-
YKF
9h 50m
1 stop
C$ 512WestJet
Thu, 10 Sep - Sat, 12 Sep
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:35 p.m. - 7:50 p.m.
SEA
-
YKF
21h 15m
1 stop
C$ 513WestJet
Fri, 11 Sep - Mon, 21 Sep
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:35 p.m. - 7:50 p.m.
SEA
-
YKF
21h 15m
1 stop
C$ 516WestJet
Tue, 11 Aug - Sat, 15 Aug
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:00 a.m. - 7:50 p.m.
SEA
-
YKF
9h 50m
1 stop
C$ 517WestJet
Thu, 20 Aug - Fri, 28 Aug
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:35 p.m. - 7:50 p.m.
SEA
-
YKF
21h 15m
1 stop
C$ 519WestJet
Sat, 29 Aug - Sat, 5 Sep
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:35 p.m. - 7:50 p.m.
SEA
-
YKF
21h 15m
1 stop
C$ 523WestJet
Sat, 29 Aug - Mon, 7 Sep
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:00 a.m. - 7:50 p.m.
SEA
-
YKF
9h 50m
1 stop
C$ 527WestJet
Wed, 22 Jul - Mon, 27 Jul
WestJet Logo
8:40 p.m. - 6:45 p.m.
YKF
-
SEA
25h 05m
1 stop
WestJet Logo
7:00 a.m. - 7:50 p.m.
SEA
-
YKF
9h 50m
1 stop
C$ 533WestJet
Wed, 15 Jul - Sat, 18 Jul
WestJet Logo
8:40 p.m. - 9:40 a.m.
YKF
-
SEA
16h 00m
1 stop
WestJet Logo
7:00 a.m. - 7:50 p.m.
SEA
-
YKF
9h 50m
1 stop
C$ 534WestJet
Booking Insights

KAYAK's insights & trends for Region of Waterloo Intl to Seattle flights

Get data-powered insights and trends into flights from Region of Waterloo Intl to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the most popular layover airport when flying from Toronto Region of Waterloo Intl to Seattle?

Percentage of one-stop round-trip flights from Toronto Region of Waterloo Intl to Seattle chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Toronto (YYZ) is the top choice – 75% of KAYAK users who clicked on one-stop flights from Toronto Region of Waterloo Intl to Seattle picked an itinerary connecting there.

What is the cheapest layover airport when flying from Toronto Region of Waterloo Intl to Seattle?

Average round-trip price for one-stop flights from Toronto Region of Waterloo Intl to Seattle clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of C$ 356.

Which layover airport offers the shortest total travel time from Toronto Region of Waterloo Intl to Seattle?

Shortest average total travel time for one-stop one-way flights from Toronto Region of Waterloo Intl to Seattle via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Calgary (YYC) for the shortest journey. The average one-way travel time for flights connecting there is 7h 58m.

Which layover airport has the quickest connection when flying from Toronto Region of Waterloo Intl to Seattle?

Average layover duration at different layover airports for one-stop one-way flights from Toronto Region of Waterloo Intl to Seattle, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Toronto (YYZ) often has the shortest layovers from Toronto Region of Waterloo Intl to Seattle, with an average of 2h 06m.

Good to know

Cheapest flightC$ 247
Flight from Toronto Region of Waterloo Intl to Seattle

When to book flights from Region of Waterloo Intl to Seattle

Are your dates flexible? Find out the best times to travel from Region of Waterloo Intl to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Toronto Region of Waterloo Intl to Seattle flights

  • What is the cheapest flight from Toronto Region of Waterloo Intl Airport to Seattle?

    In the last 5 days, the lowest price for a flight from Toronto Region of Waterloo Intl Airport to Seattle was C$ 247 for a one-way ticket and C$ 510 for a round-trip.

  • Which aircraft models fly most regularly from Toronto Region of Waterloo Intl to Seattle?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Toronto Region of Waterloo Intl to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Toronto Region of Waterloo Intl to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Toronto Region of Waterloo Intl to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Toronto Region of Waterloo Intl is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Toronto Region of Waterloo Intl to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Toronto Region of Waterloo Intl with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Toronto Region of Waterloo Intl to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Toronto Region of Waterloo Intl up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Region of Waterloo Intl to Seattle

Information on your arrival and departure airports