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

WestJet, at $282, was found to be the cheapest airline from Toronto Region of Waterloo Intl Airport to San Francisco.. WestJet is currently priced 19% below the average price you’ll pay for this route.

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

Currently, January is the cheapest month in which you can book a flight from Toronto Region of Waterloo Intl Airport to San Francisco (average of $276). Flying from Toronto Region of Waterloo Intl Airport to San Francisco in June is currently the most expensive (average of $358). 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.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

How far in advance should I book a flight from Toronto Region of Waterloo Intl Airport to San Francisco?

Travelers have found it’s best to book a flight 44 days in advance to save up to 89% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 44 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Toronto Region of Waterloo Intl Airport to San Francisco 1-2 weeks in advance for as low as $425, or $745 for flights within the next 24 hours.

What is the cheapest month to fly from Toronto Region of Waterloo Intl Airport to San Francisco?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, April can be a great choice for travel to San Francisco. Flights to San Francisco from Toronto Region of Waterloo Intl Airport in April are about $388 on average during April, but can be found for as low as $214.

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

When flying from Toronto Region of Waterloo Intl Airport to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Most people fly into San Francisco (SFO) if they book a flight to San Francisco from Toronto Region of Waterloo Intl. On average, San Francisco has 0 inbound flights from Toronto Region of Waterloo Intl per day from 0 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

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.

$179+ Flights from Toronto Region of Waterloo Intl Airport to San Francisco

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Cheap flight deals from Region of Waterloo Intl to San Francisco

Round-trip from	$282 (SmartFares)
One-way from	$179 (FlightHub)
Popular in	December
Cheapest in	February
Average price	$268

From Toronto Region of Waterloo Intl to San Francisco

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One-way flight from Toronto Region of Waterloo Intl to San Francisco

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Highest demand for flights based on searches. 17% potential increase in price ($77 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($17 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Region of Waterloo Intl to San Francisco

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 July 29, 2025.

Thu 8/216:00 amYKF - SFO

1 stop8h 56mWestJet

Tue 8/267:30 amSFO - YKF

1 stop8h 26mWestJet

Deal found 7/27

$282

Thu 8/286:00 amYKF - SFO

1 stop8h 56mMultiple Airlines

Fri 9/55:45 amSFO - YKF

3 stops16h 00mMultiple Airlines

Deal found 7/29

$329

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 July 29, 2025.

Thu 8/216:00 amYKF - SFO

1 stop8h 56mWestJet

Tue 8/267:30 amSFO - YKF

1 stop8h 26mWestJet

Deal found 7/27

$282

Thu 8/286:00 amYKF - SFO

1 stop8h 56mMultiple Airlines

Fri 9/55:45 amSFO - YKF

3 stops16h 00mMultiple Airlines

Deal found 7/29

$329

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 July 29, 2025 and is based on user searches.

Thu 8/76:00 amYKF - SFO

1 stop8h 56mWestJet

Tue 8/267:30 amSFO - YKF

1 stop8h 26mWestJet

Deal found 7/28

$583

Thu 8/77:45 pmYKF - SFO

2 stops16h 45mMultiple Airlines

Sat 8/2310:15 amSFO - YKF

1 stop17h 55mMultiple Airlines

Deal found 7/28

$656

Fri 8/88:25 pmYKF - SFO

1 stop16h 05mFlair Airlines

Sun 8/1710:15 amSFO - YKF

1 stop17h 55mFlair Airlines

Deal found 7/28

$697

Wed 8/138:25 pmYKF - SFO

1 stop16h 05mFlair Airlines

Sat 8/1610:15 amSFO - YKF

1 stop17h 55mFlair Airlines

Deal found 7/28

$384

Thu 8/216:00 amYKF - SFO

1 stop8h 56mWestJet

Tue 8/267:30 amSFO - YKF

1 stop8h 26mWestJet

Deal found 7/27

$282

Thu 8/286:00 amYKF - SFO

1 stop8h 56mMultiple Airlines

Fri 9/55:45 amSFO - YKF

3 stops16h 00mMultiple Airlines

Deal found 7/29

$329

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 July 29, 2025.

Sun 8/316:00 amYKF - SFO

1 stop14h 15mWestJet

Deal found 7/27

$179

Mon 9/226:00 amYKF - SFO

1 stop18h 24mMultiple Airlines

Deal found 7/29

$183

Mon 8/118:25 pmYKF - SFO

1 stop16h 05mFlair Airlines

Deal found 7/28

$222

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

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Thu 8/21

6:00 am-11:56 am

1 stop8h 56m

San Francisco

Tue 8/26

7:30 am-6:56 pm

1 stop8h 26m

$282

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Thu 8/28

6:00 am-11:56 am

1 stop8h 56m

San Francisco

Fri 9/5

5:45 am-12:45 am

3 stops16h 00m

$329

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Sun 8/31

6:00 am-5:15 pm

1 stop14h 15m

$179

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Mon 9/22

6:00 am-9:24 pm

1 stop18h 24m

$183

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Mon 8/11

8:25 pm-9:30 am

1 stop16h 05m

$222

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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.

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.

Reviews of airlines servicing San Francisco

Read reviews from past customers who have flown WestJet and Flair Airlines from Toronto Region of Waterloo Intl Airport to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

WestJet

7.2

Good

2,972 reviews

Reviews

1 / 20

6.0

Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

WestJet

7.2

Good

2,972 reviews

WestJet

7.2

Good

2,972 reviews

Reviews

1 / 20

6.0

Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Flair Airlines

6.0

Okay

247 reviews

WestJet

7.2

Good

2,972 reviews

Reviews

1 / 20

6.0

Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Related info for your journey

What airport do you fly into for flights to San Francisco from Toronto Region of Waterloo Intl?
Most people fly into San Francisco (SFO) if they book a flight to San Francisco from Toronto Region of Waterloo Intl. On average, San Francisco has 0 inbound flights from Toronto Region of Waterloo Intl per day from 0 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.
What is the cheapest airline to fly from Toronto Region of Waterloo Intl Airport to San Francisco round-trip?
WestJet, at $282, was found to be the cheapest airline from Toronto Region of Waterloo Intl Airport to San Francisco.. WestJet is currently priced 19% below the average price you’ll pay for this route.
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.
What is the cheapest month to book a flight from Toronto Region of Waterloo Intl Airport to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Toronto Region of Waterloo Intl Airport to San Francisco (average of $276). Flying from Toronto Region of Waterloo Intl Airport to San Francisco in June is currently the most expensive (average of $358). 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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$179+ Cheap flights from Region of Waterloo Intl (YKF) to San Francisco (SFO)

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Region of Waterloo Intl to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Region of Waterloo Intl to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 July 29, 2025.

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 July 29, 2025.

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.

Reviews of airlines servicing San Francisco

Related info for your journey

Find useful and relevant information for your journey from Region of Waterloo Intl to San Francisco. 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 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?

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

Traveling to a place near San Francisco?

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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 July 29, 2025.