In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

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

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 San Francisco as you normally would.

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

San Francisco (SFO), located 17.7 km from the city centre, is the airport you fly into when you book flights from Toronto Region of Waterloo Intl to San Francisco. 0 airlines have flights to San Francisco from Toronto Region of Waterloo Intl on a regular basis. Booking flights from Toronto Region of Waterloo Intl to San Francisco should not be difficult; the airport handles an average of 0 inbound flights from Toronto Region of Waterloo Intl per day.

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

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

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

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 San Francisco.

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

Yes. Cheapflights offers flight deals from Region of Waterloo Intl to San Francisco 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$ 270+ Cheap Flights from Toronto Region of Waterloo Intl Airport to San Francisco

Cheap flight deals from Region of Waterloo Intl to San Francisco

Enter your travel dates to find the best prices.

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

Tue 15/98:40 p.m. -

1 stop18h 20m

Wed 23/96:00 a.m. -

1 stop10h 50m

Deal found 6/9C$ 430

Tue 15/98:40 p.m. -

1 stop18h 20m

Sat 19/96:00 a.m. -

1 stop10h 50m

Deal found 5/9C$ 432

Sat 26/98:40 p.m. -

1 stop18h 20m

Sun 4/106:00 a.m. -

1 stop10h 50m

Deal found 8/9C$ 438

Tue 22/98:40 p.m. -

1 stop18h 20m

Mon 28/96:00 a.m. -

1 stop10h 50m

Deal found 8/9C$ 440

Tue 22/98:40 p.m. -

1 stop18h 20m

Sat 3/106:00 a.m. -

1 stop10h 50m

Deal found 6/9C$ 441

Fri 18/98:40 p.m. -

1 stop18h 20m

Wed 30/96:00 a.m. -

1 stop10h 50m

Deal found 6/9C$ 452

Tue 29/98:40 p.m. -

1 stop28h 15m

Sat 3/106:00 a.m. -

1 stop10h 50m

Deal found 5/9C$ 463

Wed 30/98:40 p.m. -

1 stop28h 15m

Mon 5/106:00 a.m. -

1 stop10h 50m

Deal found 6/9C$ 465

Thu 1/108:40 p.m. -

1 stop28h 15m

Sun 4/106:00 a.m. -

1 stop10h 50m

Deal found 8/9C$ 474

Find flight deals from Region of Waterloo Intl to San Francisco

Round-trip from	C$ 432
One-way from	C$ 270
Popular in	July
Cheapest in	January
Average price	C$ 539

WestJet
22/9-29/9
2 total stops
29h 10m total
Toronto to San Francisco

Search Deals

WestJet
4/10-31/12
1 total stop
28h 15m total
Toronto to San Francisco

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (C$ 100 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 13 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 Toronto Region of Waterloo Intl Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Wed 30/9

8:40 p.m.-9:55 p.m.

1 stop28h 15m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 291

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Thu 1/10

8:40 p.m.-9:27 p.m.

2 stops27h 47m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 317

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Sun 4/10

8:40 p.m.-12:00 p.m.

1 stop18h 20m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 325

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Thu 15/10

6:05 a.m.-6:31 p.m.

2 stops15h 26m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 327

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Sun 11/10

8:40 p.m.-10:27 p.m.

2 stops28h 47m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 408

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Tue 22/9

8:40 p.m.-12:00 p.m.

1 stop18h 20m

San Francisco

Tue 29/9

6:00 a.m.-7:50 p.m.

1 stop10h 50m

C$ 432

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Tue 22/9

8:40 p.m.-12:00 p.m.

1 stop18h 20m

San Francisco

Mon 28/9

6:00 a.m.-7:50 p.m.

1 stop10h 50m

C$ 460

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Fri 2/10

8:40 p.m.-12:00 p.m.

1 stop18h 20m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 462

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Sun 11/10

8:40 p.m.-9:55 p.m.

1 stop28h 15m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 503

Quickest round-trip

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Sat 26/9

8:40 p.m.-8:55 a.m.

2 stops15h 15m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 505

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 19 resultsSorted by cheapest first

Best time to book a flight from Region of Waterloo Intl to San Francisco

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

YKF-SFO

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 San Francisco

What’s the top layover airport for flights from Toronto Region of Waterloo Intl Airport to San Francisco?

Toronto (YYZ) – chosen by Cheapflights users on 67% of one-stop itineraries from Toronto Region of Waterloo Intl Airport to San Francisco on Cheapflights.

What’s the cheapest layover airport for flights from Toronto Region of Waterloo Intl Airport to San Francisco?

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 352.

What’s the fastest layover option from Toronto Region of Waterloo Intl Airport to San Francisco?

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 8h 45m.

Which airport typically offers the quickest layover for flights from Toronto Region of Waterloo Intl Airport to San Francisco?

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 34m.

Related info for your journey

What airport do you fly into for flights to San Francisco from Toronto Region of Waterloo Intl?
San Francisco (SFO), located 17.7 km from the city centre, is the airport you fly into when you book flights from Toronto Region of Waterloo Intl to San Francisco. 0 airlines have flights to San Francisco from Toronto Region of Waterloo Intl on a regular basis. Booking flights from Toronto Region of Waterloo Intl to San Francisco should not be difficult; the airport handles an average of 0 inbound flights from Toronto Region of Waterloo Intl per day.
How long is the flight from Toronto Region of Waterloo Intl Airport to San Francisco?
WestJet can get you from Toronto Region of Waterloo Intl Airport to San Francisco in just under 18h 20m. Your travel time can differ by up to . The distance from Toronto Region of Waterloo Intl Airport to San Francisco is about 3566 km.
Can I find deals for flights from Region of Waterloo Intl to San Francisco that include hotel bookings?
Yes. In addition to deals on Region of Waterloo Intl to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Region of Waterloo Intl to San Francisco?
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 San Francisco.
Can I find deals for business class flights from Region of Waterloo Intl to San Francisco?
Yes. Cheapflights offers flight deals from Region of Waterloo Intl to San Francisco 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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Deals for Region of Waterloo Intl to San Francisco 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.

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Millions of users choose and trust Cheapflights to book the best flight deals from Region of Waterloo Intl to San Francisco 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 Region of Waterloo Intl to San Francisco with no change fees?

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

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

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Cheap flights from Toronto Region of Waterloo Intl Airport to San Francisco from C$ 270

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 4/10. 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 San Francisco

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

Best flights from Region of Waterloo Intl to San FranciscoDiscover carefully curated flight deals from Region of Waterloo Intl to San Francisco 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 Region of Waterloo Intl to San Francisco 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 Region of Waterloo Intl to San FranciscoDiscover last-minute flight deals from Region of Waterloo Intl to San Francisco. Data last updated 10 September 2026 and is based on user searches.

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

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

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

Find flight deals from Region of Waterloo Intl to San Francisco

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

Best time to book a flight from Region of Waterloo Intl to San Francisco

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

Cheapflights Insights

What’s the top layover airport for flights from Toronto Region of Waterloo Intl Airport to San Francisco?

Toronto (YYZ) – chosen by Cheapflights users on 67% of one-stop itineraries from Toronto Region of Waterloo Intl Airport to San Francisco on Cheapflights.

What’s the cheapest layover airport for flights from Toronto Region of Waterloo Intl Airport to San Francisco?

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 352.

What’s the fastest layover option from Toronto Region of Waterloo Intl Airport to San Francisco?

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 8h 45m.

Which airport typically offers the quickest layover for flights from Toronto Region of Waterloo Intl Airport to San Francisco?

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 34m.

Related info for your journey

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

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

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

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

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

Travelling to a place near San Francisco?

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Alternative routes for Region of Waterloo Intl to San Francisco

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Complete your trip

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Search flights from Region of Waterloo Intl to San Francisco by cabin class

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Region of Waterloo Intl and San Francisco flights

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

Other flights from Region of Waterloo Intl

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

Best flights from Region of Waterloo Intl to San Francisco
Discover carefully curated flight deals from Region of Waterloo Intl to San Francisco 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 Region of Waterloo Intl to San Francisco
Discover last-minute flight deals from Region of Waterloo Intl to San Francisco. Data last updated 10 September 2026 and is based on user searches.

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