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$152+ Cheap flights from Region of Waterloo Intl (YKF) to Washington

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
YKF — SEA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Region of Waterloo Intl to Washington

Cheapest flights from Region of Waterloo Intl to Washington
Explore the most affordable flight options available from Region of Waterloo Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Trip.com deal was found by Cheapflights users on 12/16. 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 12/226:20 amYKF - SEA
1 stop11h 00mWestJet
Wed 12/313:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/16$808
This Trip.com deal was found by Cheapflights users on 12/17. 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 12/226:20 amYKF - SEA
1 stop11h 00mWestJet
Mon 12/293:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/17$933
This FlightHub deal was found by Cheapflights users on 12/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:20 amYKF - SEA
1 stop11h 00mWestJet
Sun 1/113:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/16$960
This FlightHub deal was found by Cheapflights users on 12/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:25 amYKF - SEA
1 stop10h 55mWestJet
Mon 12/293:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/16$1,030
This Gotogate deal was found by Cheapflights users on 12/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:20 amYKF - SEA
1 stop11h 00mWestJet
Sun 12/213:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/15$1,114
This Trip.com deal was found by Cheapflights users on 12/16. 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.
Sat 12/207:00 pmYKF - SEA
1 stop22h 20mWestJet
Sun 1/43:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/16$1,315
This FlightHub deal was found by Cheapflights users on 12/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:25 amYKF - SEA
1 stop10h 55mWestJet
Fri 1/23:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/18$1,424

Find flight deals from Region of Waterloo Intl to Washington

Keep the following information in mind while searching for Region of Waterloo Intl to Washington flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$229
(oojo)

One-way from

$152
(WestJet)

Popular in

December

Cheapest in

February

Average price

$449
Provider with most accurate pricing for Toronto (YTO)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Toronto (YTO)-Seattle/Tacoma Intl flights.
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From Toronto Region of Waterloo Intl to Washington
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One-way flight from Toronto Region of Waterloo Intl to Washington
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Region of Waterloo Intl to Washington 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 December 18, 2025.
Use the filters below to find and compare flights from Toronto Region of Waterloo Intl Airport to Washington that are best for you.

Fly from

Region of Waterloo Intl

Fly to

Washington

Route

Depart

Return

Price

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 5/1

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Thu 5/7

7:05 am-12:45 am

1 stop14h 40m

$229

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 3/5

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Sun 3/8

3:10 pm-5:29 am

1 stop11h 19m

$232

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 3/9

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Sun 3/15

3:10 pm-5:29 am

1 stop11h 19m

$232

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sun 5/17

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Sun 5/24

7:05 am-12:45 am

1 stop14h 40m

$233

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 5/13

6:00 am-1:08 pm

1 stop10h 08m

Seattle/Tacoma Intl

Wed 5/20

7:05 am-12:45 am

1 stop14h 40m

$234

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sat 5/2

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Sun 5/10

7:05 am-12:45 am

1 stop14h 40m

$239

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 1/22

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Sun 1/25

3:10 pm-5:28 am

1 stop11h 18m

$239

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sat 3/7

7:00 pm-1:19 pm

1 stop21h 19m

Seattle/Tacoma Intl

Wed 3/11

3:10 pm-5:29 am

1 stop11h 19m

$296

TorontoPortland

YKF - PDX

YKFPDX

Toronto Region of Waterloo Intl

Mon 5/11

6:00 am-1:20 pm

1 stop10h 20m

Portland

Sun 5/31

2:00 pm-12:45 am

1 stop7h 45m

$400

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 1/22

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Wed 2/4

3:10 pm-5:29 am

1 stop11h 19m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 28 results
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Best time to book a flight from Region of Waterloo Intl to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Region of Waterloo Intl 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 Toronto Region of Waterloo Intl Airport to Washington

What is the cheapest time of day to fly from YKF to WA?

Find hourly flight availability from Region of Waterloo Intl to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s optimal to fly from Toronto Region of Waterloo Intl Airport to State of Washington in the morning. By choosing this option you can save up to 57% on the cost of your flight, compared to a flight at noon.

Related info for your journey

Find useful and relevant information for your journey from Region of Waterloo Intl to Washington. 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 Toronto Region of Waterloo Intl Airport to State of Washington?

    WestJet can get you from Toronto Region of Waterloo Intl Airport to State of Washington in just under 17h 28m. Your travel time can differ by up to . Airlines will cover a distance of 2024 mi.

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

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

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

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

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

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

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