In terms of precipitation, rainfall in Seattle 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 Seattle when rainfall is around 18.0 mm.

If weather is an important factor for your trip to Seattle, 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 SEA?

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 Seattle as you normally would.

What airport do you fly into for flights to Seattle from Toronto Region of Waterloo Intl?

Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Toronto Region of Waterloo Intl to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Toronto Region of Waterloo Intl; the airport handles an average of 0 inbound flights from Toronto Region of Waterloo Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Seattle airport from Toronto Region of Waterloo Intl. It is only a 18.4 km journey from Seattle/Tacoma Intl (SEA) to Seattle’s city centre.

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

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

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

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 Seattle.

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

Yes. Cheapflights offers flight deals from Region of Waterloo Intl to Seattle 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$ 414+ Cheap Flights from Toronto Region of Waterloo Intl Airport to Seattle

Cheap flight deals from Region of Waterloo Intl to Seattle

Enter your travel dates to find the best prices.

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Cheapest flights from Region of Waterloo Intl to Seattle
Explore the most affordable flight options available from Region of Waterloo Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 October 2026.

Thu 3/127:00 p.m. -

1 stop21h 40m

Thu 10/122:30 p.m. -

1 stop22h 15m

Deal found 19/10C$ 792

Thu 5/117:00 p.m. -

2 stops17h 32m

Sun 8/117:05 p.m. -

2 stops17h 40m

Deal found 21/10C$ 1,291

Fri 23/106:05 a.m. -

1 stop15h 40m

Sun 25/107:59 p.m. -

2 stops16h 46m

Deal found 22/10C$ 2,425

Find flight deals from Region of Waterloo Intl to Seattle

Round-trip from	C$ 792
One-way from	C$ 414
Popular in	June
Cheapest in	February
Average price	C$ 610

3/12-10/12
2 total stops
43h 55m total
Toronto to Seattle

Search Deals

3/12-31/12
1 total stop
17h 04m total
Toronto to Seattle

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (C$ 57 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Toronto Region of Waterloo Intl Airport to Seattle 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

Thu 3/12

7:00 p.m.-9:04 a.m.

1 stop17h 04m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 414

TorontoSeattle

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

YKFSEA

Toronto Region of Waterloo Intl

Mon 7/12

4:30 p.m.-1:40 p.m.

2 stops24h 10m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 470

TorontoSeattle

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

YKFSEA

Toronto Region of Waterloo Intl

Thu 24/12

7:00 p.m.-9:30 a.m.

2 stops17h 30m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 701

TorontoSeattle

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

YKFSEA

Toronto Region of Waterloo Intl

Thu 3/12

7:00 p.m.-1:40 p.m.

1 stop21h 40m

Seattle/Tacoma Intl

Thu 10/12

2:30 p.m.-3:45 p.m.

1 stop22h 15m

C$ 792

Quickest round-trip

TorontoSeattle

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

YKFSEA

Toronto Region of Waterloo Intl

Thu 5/11

7:00 p.m.-8:41 a.m.

2 stops16h 41m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 909

TorontoSeattle

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

YKFSEA

Toronto Region of Waterloo Intl

Thu 5/11

7:00 p.m.-9:32 a.m.

2 stops17h 32m

Seattle/Tacoma Intl

Sun 8/11

7:05 p.m.-3:45 p.m.

2 stops17h 40m

C$ 1,291

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/10

Sorted by cheapest first

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

Have a flexible travel schedule? Discover the best time to fly to Seattle 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.

Related info for your journey

What airport do you fly into for flights to Seattle from Toronto Region of Waterloo Intl?
Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Toronto Region of Waterloo Intl to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Toronto Region of Waterloo Intl; the airport handles an average of 0 inbound flights from Toronto Region of Waterloo Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Seattle airport from Toronto Region of Waterloo Intl. It is only a 18.4 km journey from Seattle/Tacoma Intl (SEA) to Seattle’s city centre.
Can I find deals for flights from Region of Waterloo Intl to Seattle that include hotel bookings?
Yes. In addition to deals on Region of Waterloo Intl to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Region of Waterloo Intl to Seattle?
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 Seattle.
Can I find deals for business class flights from Region of Waterloo Intl to Seattle?
Yes. Cheapflights offers flight deals from Region of Waterloo Intl to Seattle 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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Complete your trip

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Deals for Region of Waterloo Intl to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Region of Waterloo Intl to Seattle?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Region of Waterloo Intl to Seattle.

Can Cheapflights find flights from Region of Waterloo Intl to Seattle with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Region of Waterloo Intl to Seattle flexibly with Cheapflights today.

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Cheap flights from Toronto Region of Waterloo Intl Airport to Seattle from C$ 414

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 3/12. 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 Seattle

Cheapest flights from Region of Waterloo Intl to SeattleExplore the most affordable flight options available from Region of Waterloo Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 October 2026.

Explore the most affordable flight options available from Region of Waterloo Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 October 2026.

Best flights from Region of Waterloo Intl to SeattleDiscover carefully curated flight deals from Region of Waterloo Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.

Discover carefully curated flight deals from Region of Waterloo Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.

Last-minute flights from Region of Waterloo Intl to SeattleDiscover last-minute flight deals from Region of Waterloo Intl to Seattle. Data last updated 24 October 2026 and is based on user searches.

Discover last-minute flight deals from Region of Waterloo Intl to Seattle. Data last updated 24 October 2026 and is based on user searches.

One-way flights from Region of Waterloo Intl to SeattleSearch for one-way flight options from Region of Waterloo Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated 24 October 2026.

Search for one-way flight options from Region of Waterloo Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated 24 October 2026.

Find flight deals from Region of Waterloo Intl to Seattle

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Use the filters below to find and compare flights from Toronto Region of Waterloo Intl Airport to Seattle that are best for you.

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

Have a flexible travel schedule? Discover the best time to fly to Seattle from Region of Waterloo Intl with our price prediction graph.

Related info for your journey

What airport do you fly into for flights to Seattle from Toronto Region of Waterloo Intl?

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

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

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

Travelling to a place near Seattle?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Region of Waterloo Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Washington

Book a non-stop flight to one of these other cities located in Washington.

Search flights from Region of Waterloo Intl to Seattle by cabin class

Find flights from Region of Waterloo Intl to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Region of Waterloo Intl and Seattle flights

Browse other Region of Waterloo Intl and Seattle flight options. Last updated on 24 October 2026.

Other flights from Region of Waterloo Intl

Browse through other flights departing from Region of Waterloo Intl. Flights are based on user searches made on Cheapflights and were last updated on 24 October 2026.

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Check out other popular destinations found by fellow travellers in 2026

Other flights to Seattle

Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 24 October 2026.

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Why should you use Cheapflights to find cheap flight tickets from Region of Waterloo Intl to Seattle?

Can Cheapflights find flights from Region of Waterloo Intl to Seattle with no change fees?

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

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Cheapest flights from Region of Waterloo Intl to Seattle
Explore the most affordable flight options available from Region of Waterloo Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 October 2026.

Best flights from Region of Waterloo Intl to Seattle
Discover carefully curated flight deals from Region of Waterloo Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.

Last-minute flights from Region of Waterloo Intl to Seattle
Discover last-minute flight deals from Region of Waterloo Intl to Seattle. Data last updated 24 October 2026 and is based on user searches.

One-way flights from Region of Waterloo Intl to Seattle
Search for one-way flight options from Region of Waterloo Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated 24 October 2026.