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. 1 airline 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$ 455+ 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.

Cheapest

One-way

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 25 October 2026.

Wed 21/108:40 p.m. -

1 stop18h 20m

Fri 23/106:00 a.m. -

1 stop10h 50m

Deal found 20/10C$ 1,669

Find flight deals from Region of Waterloo Intl to San Francisco

Popular in	July
Cheapest in	January
Average price	C$ 570

Highest demand for flights based on searches. 10% potential increase in price (C$ 93 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).

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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 San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Sat 5/12

7:00 p.m.-8:30 a.m.

2 stops16h 30m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 455

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Thu 10/12

7:00 p.m.-8:30 a.m.

2 stops16h 30m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 464

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Thu 12/11

7:00 p.m.-8:30 a.m.

2 stops16h 30m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 518

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Thu 19/11

7:00 p.m.-8:30 a.m.

2 stops16h 30m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 521

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Sat 9/1

7:00 p.m.-8:30 a.m.

2 stops16h 30m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 560

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Fri 4/12

4:30 p.m.-8:30 a.m.

3 stops43h 00m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 567

TorontoSan Francisco

YKF Toronto Region of Waterloo Intl - SFO San Francisco

YKFSFO

Toronto Region of Waterloo Intl

Sat 14/11

7:00 p.m.-8:30 a.m.

2 stops16h 30m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 676

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/10

Sorted 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 83% 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$ 357.

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 37m.

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 36m.

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from Toronto Region of Waterloo Intl Airport to San Francisco, such as Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Air Canada

7.1

Good

11,810 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had

Air Canada

7.1

Good

11,810 reviews

Air Canada

7.1

Good

11,810 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Sylvia,Aug 2026

YYZ - PHL

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. 1 airline 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.
What is the cheapest airline to fly from Toronto Region of Waterloo Intl Airport to San Francisco round-trip?
Cheapflights users have booked flights from Toronto Region of Waterloo Intl Airport to San Francisco round-trip from C$ 437.
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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Top airline flying from Region of Waterloo Intl to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 437	AverageC$ 543	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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

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$ 455

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 5/12. 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 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 25 October 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 25 October 2026.

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 25 October 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 25 October 2026.

Find flight deals from Region of Waterloo Intl to San Francisco

Popular in

Cheapest in

Average price

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.

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 83% 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$ 357.

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 37m.

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 36m.

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from Toronto Region of Waterloo Intl Airport to San Francisco, such as Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

Region of Waterloo Intl and San Francisco flights

Browse other Region of Waterloo Intl and San Francisco flight options. Last updated on 25 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 25 October 2026.

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Top airline flying from Region of Waterloo Intl to San Francisco

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

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

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

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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 25 October 2026.

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 25 October 2026.