In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

If weather is an important factor for your trip to State of Washington, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Toronto Region of Waterloo Intl Airport to State of Washington as you normally would.

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.

C$ 331+ Cheap Flights from Toronto Region of Waterloo Intl Airport to Washington

Cheap flight deals from Region of Waterloo Intl to Washington

Enter your travel dates to find the best prices.

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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 1 October 2026.

Wed 14/108:40 p.m. -

1 stop25h 05m

Tue 20/107:35 p.m. -

1 stop21h 15m

Deal found 26/9C$ 469

Sun 11/108:40 p.m. -

1 stop16h 00m

Thu 15/107:35 p.m. -

1 stop21h 15m

Deal found 27/9C$ 484

Mon 19/108:40 p.m. -

1 stop25h 05m

Thu 22/107:35 p.m. -

1 stop21h 15m

Deal found 27/9C$ 550

Wed 7/108:40 p.m. -

1 stop25h 05m

Sun 18/107:35 p.m. -

1 stop21h 15m

Deal found 26/9C$ 666

Sat 3/108:40 p.m. -

1 stop16h 00m

Sun 11/107:35 p.m. -

1 stop21h 15m

Deal found 27/9C$ 713

Wed 14/108:40 p.m. -

1 stop16h 00m

Mon 19/108:02 a.m. -

1 stop8h 48m

Deal found 28/9C$ 727

Sun 4/108:40 p.m. -

1 stop25h 05m

Sun 11/107:35 p.m. -

1 stop21h 15m

Deal found 27/9C$ 768

Fri 16/108:40 p.m. -

1 stop16h 00m

Mon 19/108:02 a.m. -

1 stop8h 48m

Deal found 26/9C$ 795

Mon 12/108:40 p.m. -

1 stop25h 05m

Sun 18/107:35 p.m. -

1 stop21h 15m

Deal found 26/9C$ 801

Find flight deals from Region of Waterloo Intl to Washington

Round-trip from	C$ 469
One-way from	C$ 331
Popular in	June
Cheapest in	February
Average price	C$ 589

WestJet
14/10-20/10
2 total stops
46h 20m total
Toronto to Washington

Search Deals

WestJet
21/10-31/12
1 total stop
16h 00m total
Toronto to Washington

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (C$ 81 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Fri 23/10

8:40 p.m.-6:45 p.m.

1 stop25h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 346

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Wed 21/10

8:40 p.m.-9:40 a.m.

1 stop16h 00m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 359

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Mon 19/10

8:40 p.m.-6:45 p.m.

1 stop25h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 359

Quickest round-trip

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Thu 15/10

6:05 a.m.-6:45 p.m.

1 stop15h 40m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 435

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Wed 14/10

8:40 p.m.-6:45 p.m.

1 stop25h 05m

Seattle/Tacoma Intl

Tue 20/10

7:35 p.m.-7:50 p.m.

1 stop21h 15m

C$ 469

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Wed 14/10

8:40 p.m.-9:40 a.m.

1 stop16h 00m

Seattle/Tacoma Intl

Sun 18/10

7:35 p.m.-7:50 p.m.

1 stop21h 15m

C$ 484

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Thu 12/11

7:00 p.m.-6:41 p.m.

2 stops26h 41m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 569

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Fri 16/10

8:40 p.m.-6:45 p.m.

1 stop25h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 586

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Wed 14/10

8:40 p.m.-6:45 p.m.

1 stop25h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 586

TorontoSeattle

YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl

YKFSEA

Toronto Region of Waterloo Intl

Mon 19/10

8:40 p.m.-6:45 p.m.

1 stop25h 05m

Seattle/Tacoma Intl

Thu 22/10

9:45 p.m.-7:50 p.m.

2 stops19h 05m

C$ 744

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/9

Showing 1-10 of 14 resultsSorted by cheapest first

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.

YKF-SEA

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

YKF-USWA

YKF-SEA

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Toronto Region of Waterloo Intl Airport to State of Washington?
Airlines like WestJet fly from Toronto Region of Waterloo Intl Airport to State of Washington in about 25h 05m. The time it takes to get you to your destination can typically vary by up to . There are 3257 km between Toronto Region of Waterloo Intl Airport and State of Washington.
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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Alternative routes for Region of Waterloo Intl to Washington

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Can Cheapflights notify me if prices for flights from Region of Waterloo Intl to Washington become cheaper?

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Cheap flights from Toronto Region of Waterloo Intl Airport to Washington from C$ 331

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Region of Waterloo Intl to Washington

Cheapest flights from Region of Waterloo Intl to WashingtonExplore 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 1 October 2026.

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 1 October 2026.

Best flights from Region of Waterloo Intl to WashingtonDiscover carefully curated flight deals from Region of Waterloo Intl to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 1 October 2026.

Discover carefully curated flight deals from Region of Waterloo Intl to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 1 October 2026.

Last-minute flights from Region of Waterloo Intl to WashingtonDiscover last-minute flight deals from Region of Waterloo Intl to Washington. Data last updated 1 October 2026 and is based on user searches.

Discover last-minute flight deals from Region of Waterloo Intl to Washington. Data last updated 1 October 2026 and is based on user searches.

One-way flights from Region of Waterloo Intl to WashingtonSearch for one-way flight options from Region of Waterloo Intl to Washington. Find affordable one-way fares based on user searches. Data last updated 1 October 2026.

Search for one-way flight options from Region of Waterloo Intl to Washington. Find affordable one-way fares based on user searches. Data last updated 1 October 2026.

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Best time to book a flight from Region of Waterloo Intl to Washington

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Related info for your journey

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

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

How can I 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?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Region of Waterloo Intl to Washington

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Complete your trip

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Region of Waterloo Intl and Washington flights

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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 1 October 2026.

Best flights from Region of Waterloo Intl to Washington
Discover carefully curated flight deals from Region of Waterloo Intl to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 1 October 2026.

Last-minute flights from Region of Waterloo Intl to Washington
Discover last-minute flight deals from Region of Waterloo Intl to Washington. Data last updated 1 October 2026 and is based on user searches.

One-way flights from Region of Waterloo Intl to Washington
Search for one-way flight options from Region of Waterloo Intl to Washington. Find affordable one-way fares based on user searches. Data last updated 1 October 2026.