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$166+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
YKF — SEA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$227
(FlightHub)

One-way from

$166
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$330
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, 3% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Thu 12/47:05 amYKF - SEA
1 stop10h 15mMultiple Airlines
Sun 12/711:55 amSEA - YKF
2 stops14h 33mMultiple Airlines
Deal found 10/29$349
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Fri 11/217:05 amYKF - SEA
1 stop10h 15mMultiple Airlines
Mon 11/2411:55 amSEA - YKF
2 stops25h 05mMultiple Airlines
Deal found 10/30$404
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Tue 11/186:20 amYKF - SEA
1 stop11h 00mWestJet
Fri 11/2111:55 amSEA - YKF
2 stops14h 33mWestJet
Deal found 10/30$440
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Thu 12/46:20 amYKF - SEA
3 stops31h 02mWestJet
Sun 12/711:55 amSEA - YKF
3 stops14h 33mWestJet
Deal found 10/29$441
This oojo deal was found by Cheapflights users on 10/29. 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 12/166:20 amYKF - SEA
1 stop11h 00mWestJet
Wed 12/313:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 10/29$452
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Sun 11/167:05 amYKF - SEA
1 stop10h 15mMultiple Airlines
Wed 12/33:15 pmSEA - YKF
1 stop11h 13mMultiple Airlines
Deal found 10/29$474
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Mon 12/86:20 amYKF - SEA
1 stop11h 00mWestJet
Fri 12/1211:55 amSEA - YKF
2 stops14h 33mWestJet
Deal found 10/29$517
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Sat 11/296:20 amYKF - SEA
1 stop11h 20mWestJet
Wed 12/31:30 pmSEA - YKF
2 stops12h 58mWestJet
Deal found 10/29$527
This FlightHub deal was found by Cheapflights users on 10/28. 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.
Tue 11/116:20 amYKF - PDX
2 stops15h 59mWestJet
Wed 11/1911:35 amPDX - YKF
2 stops14h 53mWestJet
Deal found 10/28$754
This WestJet deal was found by Cheapflights users on 10/29. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:20 amYKF - PDX
2 stops13h 25mWestJet
Sun 11/2311:35 amPDX - YKF
2 stops14h 53mWestJet
Deal found 10/29$999
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Sun 12/217:05 amYKF - PDX
2 stops12h 35mMultiple Airlines
Sun 12/289:19 amPDX - YKF
2 stops17h 09mMultiple Airlines
Deal found 10/28$1,026
This WestJet deal was found by Cheapflights users on 10/29. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:20 amYKF - PDX
2 stops33h 58mWestJet
Sun 11/1612:35 amPDX - YKF
2 stops25h 53mWestJet
Deal found 10/29$1,249

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 October 30, 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

Thu 2/19

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Sun 2/22

3:10 pm-5:29 am

1 stop11h 19m

$227

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 12/4

7:05 am-2:20 pm

1 stop10h 15m

Seattle/Tacoma Intl

Sun 12/7

11:55 am-5:28 am

2 stops14h 33m

$349

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 1/19

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Fri 1/23

3:10 pm-5:28 am

1 stop11h 18m

$360

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sun 11/16

7:05 am-2:20 pm

1 stop10h 15m

Seattle/Tacoma Intl

Fri 12/5

3:10 pm-5:28 am

1 stop11h 18m

$364

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 2/20

7:05 am-10:21 am

2 stops30h 16m

Seattle/Tacoma Intl

Sun 2/22

11:55 am-5:29 am

2 stops14h 34m

$406

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 2/19

7:05 am-10:21 am

2 stops30h 16m

Seattle/Tacoma Intl

Sun 2/22

11:55 am-5:29 am

2 stops14h 34m

$414

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Tue 12/16

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Wed 12/31

3:10 pm-5:28 am

1 stop11h 18m

$452

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sun 11/16

7:05 am-2:20 pm

1 stop10h 15m

Seattle/Tacoma Intl

Wed 12/3

3:15 pm-5:28 am

1 stop11h 13m

$474

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 12/8

6:20 am-2:20 pm

1 stop11h 00m

Seattle/Tacoma Intl

Fri 12/12

11:55 am-5:28 am

2 stops14h 33m

$517

TorontoPortland

YKF - PDX

YKFPDX

Toronto Region of Waterloo Intl

Tue 11/11

6:20 am-7:19 pm

2 stops15h 59m

Portland

Wed 11/19

11:35 am-5:28 am

2 stops14h 53m

$754

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 October 30, 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 10h 59m. 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.

See more FAQs

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