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Region of Waterloo Intl

$139+ Cheap flights from Washington to Region of Waterloo Intl (YKF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YKF
Mar 4 — Mar 111
Wed 3/4
Wed 3/11
1 adult, Economy
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Cheap flight deals from Washington to Region of Waterloo Intl

Cheapest flights from Washington to Region of Waterloo Intl
Explore the most affordable flight options available from Washington to Region of Waterloo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.

This Trip.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/203:10 pm
SEA
-
YKF
1 stop11h 19m
WestJet
Sun 5/108:40 pm
YKF
-
SEA
1 stop16h 00m
WestJet
Deal found 2/1$290
This Trip.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:35 pm
SEA
-
YKF
1 stop21h 15m
WestJet
Sun 6/78:40 pm
YKF
-
SEA
1 stop16h 00m
WestJet
Deal found 1/31$291
This oojo deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:35 pm
SEA
-
YKF
1 stop21h 15m
WestJet
Sun 5/178:40 pm
YKF
-
SEA
1 stop16h 00m
WestJet
Deal found 1/31$315
This oojo deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:35 pm
SEA
-
YKF
1 stop21h 15m
WestJet
Mon 6/226:00 am
YKF
-
SEA
1 stop10h 08m
WestJet
Deal found 1/31$341
This oojo deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:35 pm
SEA
-
YKF
1 stop21h 15m
WestJet
Sun 6/148:40 pm
YKF
-
SEA
1 stop25h 05m
WestJet
Deal found 1/31$345
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:10 pm
SEA
-
YKF
1 stop11h 19m
Multiple Airlines
Mon 3/96:20 am
YKF
-
SEA
2 stops37h 49m
Multiple Airlines
Deal found 2/2$364
This Mytrip deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:35 pm
SEA
-
YKF
1 stop16h 25m
Multiple Airlines
Sun 5/176:05 am
YKF
-
SEA
1 stop15h 40m
Multiple Airlines
Deal found 2/1$380
This Trip.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:10 pm
SEA
-
YKF
1 stop11h 19m
WestJet
Mon 3/96:20 am
YKF
-
SEA
1 stop10h 59m
WestJet
Deal found 2/2$394
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:55 pm
SEA
-
YKF
2 stops30h 34m
Multiple Airlines
Tue 3/106:20 am
YKF
-
SEA
1 stop10h 59m
Multiple Airlines
Deal found 2/2$406

Find flight deals from Washington to Region of Waterloo Intl

Keep the following information in mind while searching for Washington to Region of Waterloo Intl flight deals. Data was last updated February 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$290
(Trip.com)

One-way from

$139
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$286
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
Search Deals
From Washington to Toronto Region of Waterloo Intl
Search Deals
One-way flight from Washington to Toronto Region of Waterloo Intl
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($72 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Region of Waterloo Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 2, 2026.
Use the filters below to find and compare flights from Washington to Toronto Region of Waterloo Intl Airport that are best for you.

Fly from

Washington

Fly to

Region of Waterloo Intl

Route

Depart

Return

Price

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Mon 4/20

3:10 pm-5:29 am

1 stop11h 19m

Toronto Region of Waterloo Intl

Sun 5/10

8:40 pm-9:40 am

1 stop16h 00m

$290

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 6/4

7:35 pm-7:50 pm

1 stop21h 15m

Toronto Region of Waterloo Intl

Sun 6/7

8:40 pm-9:40 am

1 stop16h 00m

$291

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 6/4

7:35 pm-7:50 pm

1 stop21h 15m

Toronto Region of Waterloo Intl

Mon 6/8

8:40 pm-6:45 pm

1 stop25h 05m

$315

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Sat 5/30

7:35 pm-7:50 pm

1 stop21h 15m

Toronto Region of Waterloo Intl

Sat 6/6

8:40 pm-9:40 am

1 stop16h 00m

$315

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 5/12

7:35 pm-7:50 pm

1 stop21h 15m

Toronto Region of Waterloo Intl

Sun 5/17

8:40 pm-9:40 am

1 stop16h 00m

$315

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 6/4

7:35 pm-7:50 pm

1 stop21h 15m

Toronto Region of Waterloo Intl

Mon 6/22

6:00 am-1:08 pm

1 stop10h 08m

$341

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 6/9

7:35 pm-7:50 pm

1 stop21h 15m

Toronto Region of Waterloo Intl

Sun 6/14

8:40 pm-6:45 pm

1 stop25h 05m

$345

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Mon 3/2

3:10 pm-5:29 am

1 stop11h 19m

Toronto Region of Waterloo Intl

Mon 3/9

6:20 am-2:19 pm

1 stop10h 59m

$394

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 3/3

7:55 pm-5:29 am

2 stops30h 34m

Toronto Region of Waterloo Intl

Tue 3/10

6:20 am-2:19 pm

1 stop10h 59m

$406

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Sun 3/1

11:55 am-5:29 am

3 stops14h 34m

Toronto Region of Waterloo Intl

Sun 3/8

7:05 am-10:25 am

2 stops30h 20m

$439

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Showing 1-10 of 19 results
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Best time to book a flight from Washington to Region of Waterloo Intl

Have a flexible travel schedule? Discover the best time to fly to Region of Waterloo Intl from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Toronto Region of Waterloo Intl Airport
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington to Region of Waterloo Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Toronto Region of Waterloo Intl Airport?

    For as low as $290, WestJet can have you in Toronto Region of Waterloo Intl Airport from State of Washington in 11h 19m. The distance from State of Washington to Toronto Region of Waterloo Intl Airport is about 2024 mi.

  • Can I find deals for flights from Washington to Region of Waterloo Intl that include hotel bookings?

    Yes. In addition to deals on Washington to Region of Waterloo Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Region of Waterloo Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Region of Waterloo Intl.

  • Can I find deals for business class flights from Washington to Region of Waterloo Intl?

    Yes. Cheapflights offers flight deals from Washington to Region of Waterloo Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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