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$144+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
YKF — SEA
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/96:20 am
YKF
-
SEA
1 stop10h 59m
WestJet
Mon 3/163:10 pm
SEA
-
YKF
1 stop11h 19m
WestJet
Deal found 1/28$263
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/126:20 am
YKF
-
SEA
1 stop10h 59m
WestJet
Wed 3/183:10 pm
SEA
-
YKF
1 stop11h 19m
WestJet
Deal found 1/28$264
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:40 pm
YKF
-
PDX
1 stop20h 10m
WestJet
Thu 6/112:30 pm
PDX
-
YKF
1 stop26h 20m
WestJet
Deal found 1/28$358
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:20 am
YKF
-
SEA
1 stop10h 59m
WestJet
Wed 3/43:10 pm
SEA
-
YKF
1 stop11h 19m
WestJet
Deal found 1/28$363
This Mytrip deal was found by Cheapflights users on 1/28. 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.
Thu 2/266:20 am
YKF
-
SEA
1 stop10h 59m
WestJet
Mon 3/211:55 am
SEA
-
YKF
2 stops14h 34m
WestJet
Deal found 1/28$376
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:20 am
YKF
-
SEA
1 stop10h 59m
WestJet
Fri 3/611:55 am
SEA
-
YKF
2 stops14h 34m
WestJet
Deal found 1/28$392
This Mytrip deal was found by Cheapflights users on 1/28. 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.
Thu 2/266:20 am
YKF
-
SEA
1 stop10h 59m
WestJet
Sun 3/111:55 am
SEA
-
YKF
3 stops14h 34m
WestJet
Deal found 1/28$396
This oojo deal was found by Cheapflights users on 1/27. 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 6/168:40 pm
YKF
-
PDX
1 stop20h 10m
WestJet
Sat 6/202:30 pm
PDX
-
YKF
1 stop26h 20m
WestJet
Deal found 1/27$450
This oojo deal was found by Cheapflights users on 1/27. 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.
Wed 5/278:40 pm
YKF
-
PDX
1 stop20h 10m
WestJet
Wed 6/102:30 pm
PDX
-
YKF
1 stop26h 20m
WestJet
Deal found 1/27$707
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/257:45 pm
YKF
-
PDX
1 stop20h 35m
WestJet
Mon 6/292:00 pm
PDX
-
YKF
1 stop25h 55m
WestJet
Deal found 1/28$791
This WestJet deal was found by Cheapflights users on 1/26. 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.
Sat 2/287:00 pm
YKF
-
PDX
2 stops26h 48m
WestJet
Mon 3/21:27 pm
PDX
-
YKF
2 stops13h 02m
WestJet
Deal found 1/26$801
This FlightHub deal was found by Cheapflights users on 1/28. 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.
Thu 1/296:20 am
YKF
-
PDX
2 stops13h 10m
WestJet
Wed 3/41:27 pm
PDX
-
YKF
2 stops13h 02m
WestJet
Deal found 1/28$841

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$263
(Trip.com)

One-way from

$144
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$398
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. 8% potential increase in price ($33 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 January 2026
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 January 29, 2026.
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 3/12

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Wed 3/18

3:10 pm-5:29 am

1 stop11h 19m

$264

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 2/26

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Wed 3/4

3:10 pm-5:29 am

1 stop11h 19m

$363

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 2/26

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Mon 3/2

11:55 am-5:29 am

2 stops14h 34m

$376

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 3/2

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Fri 3/6

11:55 am-5:29 am

2 stops14h 34m

$392

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 2/26

6:20 am-2:19 pm

1 stop10h 59m

Seattle/Tacoma Intl

Sun 3/1

11:55 am-5:29 am

3 stops14h 34m

$396

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 5/8

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Sun 5/17

7:35 pm-7:50 pm

1 stop21h 15m

$432

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 6/15

8:40 pm-9:00 pm

1 stop27h 20m

Seattle/Tacoma Intl

Tue 6/23

7:05 am-6:55 pm

1 stop8h 50m

$437

TorontoPortland

YKF - PDX

YKFPDX

Toronto Region of Waterloo Intl

Sat 2/28

7:00 pm-6:48 pm

2 stops26h 48m

Portland

Mon 3/2

1:27 pm-5:29 am

2 stops13h 02m

$801

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Tue 4/7

6:20 am-2:19 pm

1 stop10h 59m

$144

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Mon 3/9

6:20 am-2:19 pm

1 stop10h 59m

$145

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 18 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
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 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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