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Cheap flights from Seattle to Toronto Region of Waterloo Intl Airport from C$ 191

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YKF
9 Apr — 16 Apr1
1 adult

Cheap flight deals from Seattle to Region of Waterloo Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Region of Waterloo Intl (YKF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 April 2025.

Round-trip from

C$ 339

One-way from

C$ 191

Popular in

April

Cheapest in

January

Average price

C$ 780
WestJet
  • WestJet
  • 4/6-10/6
  • 2 total stops
  • 25h 24m total
  • Seattle to Toronto
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12/6
  • 12/6
  • 2 total stops
  • 24h 46m total
  • Seattle to Toronto
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Highest demand for flights based on searches. 8% potential increase in price (C$ 85 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Seattle to Region of Waterloo Intl

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 4 April 2025.

Wed 4/61:50 p.m.SEA - YKF
1 stop7h 56mWestJet
Tue 10/66:00 a.m.YKF - SEA
1 stop17h 28mWestJet
Deal found 2/4C$ 339
Fri 25/42:30 p.m.SEA - YKF
2 stops37h 40mMultiple Airlines
Sun 4/56:00 a.m.YKF - SEA
1 stop9h 58mMultiple Airlines
Deal found 3/4C$ 363

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Region of Waterloo Intl 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 629,999 searches. Data last updated 4 April 2025.
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

Seattle

Fly to

Region of Waterloo Intl

Route

Depart

Return

Price

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Wed 4/6

1:50 p.m.-12:46 a.m.

1 stop7h 56m

Toronto Region of Waterloo Intl

Tue 10/6

6:00 a.m.-8:28 p.m.

1 stop17h 28m

C$ 339

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Fri 25/4

2:30 p.m.-7:10 a.m.

2 stops37h 40m

Toronto Region of Waterloo Intl

Sun 4/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 363

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 12/6

3:39 p.m.-7:25 p.m.

2 stops24h 46m

C$ 191

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Wed 24/9

1:50 p.m.-12:45 a.m.

1 stop7h 55m

C$ 195

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/4

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.
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 Seattle to Toronto Region of Waterloo Intl Airport

Rainfall in Region of Waterloo Intl by month

Plan your trip to Region of Waterloo Intl by taking into account the average rainfall totals by month.

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.

Temperature in Region of Waterloo Intl by month

Plan your trip to Region of Waterloo Intl by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Region of Waterloo Intl

Get insights into the airlines that provide service to Region of Waterloo Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Region of Waterloo Intl. Reviews last updated 4 April 2025.
WestJet
7.2
Good
2,795 reviews
Check prices

Entertainment

6.1

Boarding

7.4

Comfort

7.0

Food

6.2

Crew

7.9

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Sugith,Jan 2025

CUN - YYZ

On time departure. Good service on board. Comfort Plus seating was comfortable.
WestJet
7.2
Good
2,795 reviews
WestJet
7.2
Good
2,795 reviews
Check prices

Entertainment

6.1

Boarding

7.4

Comfort

7.0

Food

6.2

Crew

7.9

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Sugith,Jan 2025

CUN - YYZ

On time departure. Good service on board. Comfort Plus seating was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Region of Waterloo Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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.

  • What is the cheapest airline to fly from Seattle to Toronto Region of Waterloo Intl Airport round-trip?

    Cheapflights users have booked flights from Seattle to Toronto Region of Waterloo Intl Airport round-trip from C$ 339.

  • 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.

  • What is the cheapest month to book a flight from Seattle to Toronto Region of Waterloo Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Toronto Region of Waterloo Intl Airport (average of C$ 114). Flying from Seattle to Toronto Region of Waterloo Intl Airport in December is currently the most expensive (average of C$ 246). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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

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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.

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