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

For as low as C$ 542, WestJet can have you in Toronto Region of Waterloo Intl Airport from Seattle in 21h 15m. Seattle and Toronto Region of Waterloo Intl Airport are separated by a distance of 3257 km.

In terms of precipitation, rainfall in Toronto Region of Waterloo Intl Airport ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Toronto Region of Waterloo Intl Airport when rainfall is around 51.0 mm.

If weather is an important factor for your trip to Toronto Region of Waterloo Intl Airport, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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

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

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

Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Toronto Region of Waterloo Intl. On average, Seattle/Tacoma Intl has 0 outbound flights to Toronto Region of Waterloo Intl per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

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

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

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

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Region of Waterloo Intl.

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

Yes. Cheapflights offers flight deals from Seattle to Region of Waterloo Intl 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$ 247+ Cheap Flights from Seattle to Toronto Region of Waterloo Intl Airport

Cheap flight deals from Seattle to Region of Waterloo Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Seattle to Region of Waterloo Intl
Explore the most affordable flight options available from Seattle to Region of Waterloo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Thu 15/107:35 p.m. -

1 stop21h 15m

Sun 18/108:40 p.m. -

1 stop16h 00m

Deal found 9/9C$ 525

Tue 15/97:35 p.m. -

1 stop21h 15m

Fri 18/98:40 p.m. -

1 stop25h 05m

Deal found 6/9C$ 578

Wed 23/97:35 p.m. -

1 stop21h 15m

Tue 29/98:40 p.m. -

1 stop25h 05m

Deal found 5/9C$ 589

Tue 29/97:35 p.m. -

1 stop21h 15m

Fri 2/108:40 p.m. -

1 stop25h 05m

Deal found 5/9C$ 590

Mon 28/97:35 p.m. -

1 stop21h 15m

Mon 5/108:40 p.m. -

1 stop25h 05m

Deal found 8/9C$ 597

Fri 16/107:35 p.m. -

1 stop16h 25m

Thu 22/106:05 a.m. -

1 stop15h 40m

Deal found 8/9C$ 611

Wed 30/97:35 p.m. -

1 stop21h 15m

Sun 4/108:40 p.m. -

1 stop16h 00m

Deal found 8/9C$ 647

Wed 14/107:35 p.m. -

1 stop16h 25m

Sun 18/106:05 a.m. -

1 stop15h 40m

Deal found 6/9C$ 649

Thu 17/97:35 p.m. -

1 stop21h 15m

Sat 19/98:40 p.m. -

1 stop16h 00m

Deal found 6/9C$ 652

Find flight deals from Seattle to Region of Waterloo Intl

Round-trip from	C$ 525
One-way from	C$ 247
Popular in	July
Cheapest in	January
Average price	C$ 801

WestJet
15/10-18/10
2 total stops
37h 15m total
Seattle to Toronto

Search Deals

WestJet
18/10-31/12
1 total stop
21h 15m total
Seattle to Toronto

Search Deals

Highest demand for flights based on searches. 23% potential increase in price (C$ 251 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (C$ 41 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Sat 17/10

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

1 stop21h 15m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 249

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Sun 8/11

5:58 p.m.-3:45 p.m.

1 stop18h 47m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 251

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Tue 29/9

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

1 stop21h 15m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 254

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Thu 15/10

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

1 stop21h 15m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 257

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Sat 19/9

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

1 stop21h 15m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 263

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Thu 17/9

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

1 stop21h 15m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 264

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Wed 23/9

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

1 stop21h 15m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 279

Quickest round-trip

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Wed 21/10

7:35 p.m.-3:00 p.m.

1 stop16h 25m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 298

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Fri 9/10

7:35 p.m.-3:00 p.m.

1 stop16h 25m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 354

SeattleToronto

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

SEAYKF

Seattle/Tacoma Intl

Thu 15/10

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

1 stop21h 15m

Toronto Region of Waterloo Intl

Sun 18/10

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

1 stop16h 00m

C$ 542

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 18 resultsSorted by cheapest first

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

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

SEA-YKF

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 from for flights from Seattle to Toronto Region of Waterloo Intl?
Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Toronto Region of Waterloo Intl. On average, Seattle/Tacoma Intl has 0 outbound flights to Toronto Region of Waterloo Intl per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.
How long is the flight from Seattle to Toronto Region of Waterloo Intl Airport?
For as low as C$ 542, WestJet can have you in Toronto Region of Waterloo Intl Airport from Seattle in 21h 15m. Seattle and Toronto Region of Waterloo Intl Airport are separated by a distance of 3257 km.
Can I find deals for flights from Seattle to Region of Waterloo Intl that include hotel bookings?
Yes. In addition to deals on Seattle to Region of Waterloo Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Region of Waterloo Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Region of Waterloo Intl.
Can I find deals for business class flights from Seattle to Region of Waterloo Intl?
Yes. Cheapflights offers flight deals from Seattle to Region of Waterloo Intl 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

Port Elgin

Southampton

Sauble Beach

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to Ontario

Flights by cabin class

Other flight options

Other flights from Seattle

Popular flights

Region of Waterloo Intl flight routes

Alternative routes for Seattle to Region of Waterloo Intl

Seattle to Pearson Intl flights

Seattle to Hamilton flights

Portland to Pearson Intl flights

Spokane to Pearson Intl flights

Bellingham to Pearson Intl flights

Pasco to Pearson Intl flights

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to Region of Waterloo Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Region of Waterloo Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Region of Waterloo Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Region of Waterloo Intl, users can toggle the no change fees filter when performing a flight search.

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

Yes! Start tracking prices for Seattle to Region of Waterloo Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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.

Cheap flights from Seattle to Toronto Region of Waterloo Intl Airport from C$ 247

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Seattle to Region of Waterloo Intl

Cheapest flights from Seattle to Region of Waterloo IntlExplore the most affordable flight options available from Seattle to Region of Waterloo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Explore the most affordable flight options available from Seattle to Region of Waterloo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Best flights from Seattle to Region of Waterloo IntlDiscover carefully curated flight deals from Seattle to Region of Waterloo Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Discover carefully curated flight deals from Seattle to Region of Waterloo Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Last-minute flights from Seattle to Region of Waterloo IntlDiscover last-minute flight deals from Seattle to Region of Waterloo Intl. Data last updated 10 September 2026 and is based on user searches.

Discover last-minute flight deals from Seattle to Region of Waterloo Intl. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Seattle to Region of Waterloo IntlSearch for one-way flight options from Seattle to Region of Waterloo Intl. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Search for one-way flight options from Seattle to Region of Waterloo Intl. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Find flight deals from Seattle to Region of Waterloo Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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

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

Related info for your journey

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

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

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

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

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

Travelling to a place near Toronto Region of Waterloo Intl Airport?

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 Seattle to Region of Waterloo Intl

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

Complete your trip

Complete your trip to Region of Waterloo Intl by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Ontario

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

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

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

Seattle and Region of Waterloo Intl flights

Browse other Seattle and Region of Waterloo Intl flight options. Last updated on 10 September 2026.

Other flights from Seattle

Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on 10 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Other flights to Region of Waterloo Intl

Explore flights to Region of Waterloo Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 10 September 2026.

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to Region of Waterloo Intl?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Seattle to Region of Waterloo Intl
Explore the most affordable flight options available from Seattle to Region of Waterloo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Best flights from Seattle to Region of Waterloo Intl
Discover carefully curated flight deals from Seattle to Region of Waterloo Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Last-minute flights from Seattle to Region of Waterloo Intl
Discover last-minute flight deals from Seattle to Region of Waterloo Intl. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Seattle to Region of Waterloo Intl
Search for one-way flight options from Seattle to Region of Waterloo Intl. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.