HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington

$155+ 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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
YKF — SEA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Region of Waterloo Intl to Washington with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 12, 2025.

This WestJet deal was found by Cheapflights users on 12/11. 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.
Fri 12/266:25 amYKF - SEA
2 stops17h 21mWestJet
Sat 12/277:45 pmSEA - YKF
2 stops30h 43mWestJet
Deal found 12/11$889
This Trip.com deal was found by Cheapflights users on 12/11. 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 12/186:20 amYKF - SEA
1 stop11h 00mWestJet
Mon 12/223:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/11$896
This WestJet deal was found by Cheapflights users on 12/10. 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.
Fri 12/266:25 amYKF - SEA
2 stops27h 55mWestJet
Mon 12/293:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/10$927
This oojo deal was found by Cheapflights users on 12/11. 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.
Sat 12/136:20 amYKF - SEA
1 stop11h 20mWestJet
Mon 12/153:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/11$953
This oojo deal was found by Cheapflights users on 12/11. 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.
Mon 12/156:20 amYKF - SEA
1 stop11h 00mWestJet
Mon 12/223:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/11$964
This WestJet deal was found by Cheapflights users on 12/11. 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.
Fri 12/266:25 amYKF - SEA
1 stop10h 55mWestJet
Sun 12/289:25 amSEA - YKF
2 stops17h 03mWestJet
Deal found 12/11$967
This FlightHub deal was found by Cheapflights users on 12/10. 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 12/306:20 amYKF - SEA
1 stop11h 00mWestJet
Sun 1/43:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/10$1,083
This FlightHub deal was found by Cheapflights users on 12/11. 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 12/156:20 amYKF - SEA
1 stop11h 00mWestJet
Fri 1/23:10 pmSEA - YKF
1 stop11h 18mWestJet
Deal found 12/11$1,086
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:25 amYKF - SEA
1 stop8h 58mMultiple Airlines
Mon 12/293:10 pmSEA - YKF
1 stop11h 18mMultiple Airlines
Deal found 12/11$1,105

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 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$230
(Trip.com)

One-way from

$155
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$403
Provider with most accurate pricing for Toronto (YTO)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-Seattle/Tacoma Intl flights.
Search Deals
From Toronto Region of Waterloo Intl to Washington
Search Deals
One-way flight from Toronto Region of Waterloo Intl to Washington
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 12, 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 5/22

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Mon 5/25

7:05 am-12:45 am

1 stop14h 40m

$230

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 4/30

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Thu 5/7

7:05 am-12:45 am

1 stop14h 40m

$231

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sat 4/18

6:20 am-2:31 pm

1 stop11h 11m

Seattle/Tacoma Intl

Mon 4/27

2:05 pm-12:45 am

1 stop7h 40m

$336

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Tue 6/2

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Tue 6/9

2:05 pm-12:45 am

1 stop7h 40m

$423

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 6/3

6:00 am-1:08 pm

1 stop10h 08m

Seattle/Tacoma Intl

Tue 6/9

2:05 pm-12:45 am

1 stop7h 40m

$423

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 4/23

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Sat 5/9

7:05 am-12:45 am

1 stop14h 40m

$425

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sun 5/31

6:00 am-8:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Wed 6/10

2:05 pm-12:45 am

1 stop7h 40m

$433

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 6/3

6:00 am-1:08 pm

1 stop10h 08m

Seattle/Tacoma Intl

Wed 6/10

2:05 pm-12:45 am

1 stop7h 40m

$435

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 2/23

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Fri 2/27

3:10 pm-5:29 am

1 stop11h 19m

$482

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sun 1/25

7:05 am-2:20 pm

1 stop10h 15m

Seattle/Tacoma Intl

Sun 2/1

3:10 pm-5:29 am

1 stop11h 19m

$502

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 24 results
1
2
3

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 12, 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Region of Waterloo Intl to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to Newark flights
Toronto Island to Newark flights
Pearson Intl to Miami flights
Pearson Intl to LaGuardia flights
Pearson Intl to Los Angeles flights
Pearson Intl to Las Vegas flights
Pearson Intl to Orlando flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to Hobby flights
Pearson Intl to Tampa flights
Toronto Island to Fort Lauderdale flights
Toronto Island to Orlando flights
Pearson Intl to San Francisco flights
Pearson Intl to Sky Harbor Intl flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Boston flights
Pearson Intl to O'Hare Intl flights
Pearson Intl to Seattle flights
Hamilton to Fort Lauderdale flights
Pearson Intl to Reagan-National flights
Pearson Intl to Fort Myers flights
Toronto Island to Boston flights
Toronto Island to Miami flights
Pearson Intl to Dulles Intl flights
Pearson Intl to Atlanta flights
Pearson Intl to West Palm Beach flights
Pearson Intl to Nashville flights
Pearson Intl to Ontario flights
Pearson Intl to Austin flights
Pearson Intl to San Diego flights
Pearson Intl to Honolulu flights
Pearson Intl to Philadelphia flights
Hamilton to Orlando flights
Toronto Island to Dallas/Fort Worth flights
Toronto Island to Midway flights
Toronto Island to Dulles Intl flights
Pearson Intl to Minneapolis flights
Toronto Island to John F Kennedy Intl flights
Pearson Intl to Denver flights
Pearson Intl to Charlotte flights
Pearson Intl to Midway flights
Pearson Intl to Love Field flights
Pearson Intl to Baltimore flights
Toronto Island to Los Angeles flights
Hamilton to John F Kennedy Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.