YKF - SFO

C$ 170 Find Cheap Flights from Toronto Region of Waterloo Intl to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Region of Waterloo Intl to San Francisco departing on 20/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to San Francisco, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to San Francisco, as well as popular online travel agencies
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Cheap Flight Deals from Region of Waterloo Intl to San Francisco (YKF-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Region of Waterloo Intl to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Region of Waterloo Intl to San Francisco

KAYAK's recommended round-trip deals from the most popular airlines that fly from Region of Waterloo Intl to San Francisco.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
WestJet Logo
6:00 a.m. - 11:56 a.m.YKF-SFO
8h 56m1 stop
WestJet Logo
12:50 p.m. - 12:46 a.m.SFO-YKF
8h 56m1 stop
C$ 313WestJet
Find Deal
Thu, 7 Aug - Mon, 11 Aug
WestJet Logo
6:00 a.m. - 11:56 a.m.YKF-SFO
8h 56m1 stop
WestJet Logo
12:50 p.m. - 12:46 a.m.SFO-YKF
8h 56m1 stop
C$ 316WestJet
Find Deal
Thu, 7 Aug - Mon, 11 Aug
WestJet Logo
6:00 a.m. - 12:05 p.m.YKF-SFO
9h 05m1 stop
WestJet Logo
7:30 a.m. - 6:56 p.m.SFO-YKF
8h 26m1 stop
C$ 330WestJet
Find Deal
Sat, 7 Jun - Tue, 19 Aug
WestJet Logo
6:00 a.m. - 12:05 p.m.YKF-SFO
9h 05m1 stop
WestJet Logo
12:50 p.m. - 12:46 a.m.SFO-YKF
8h 56m1 stop
C$ 338WestJet
Find Deal
Tue, 20 May - Wed, 21 May
WestJet Logo
6:00 a.m. - 11:56 a.m.YKF-SFO
8h 56m1 stop
WestJet Logo
12:50 p.m. - 12:45 a.m.SFO-YKF
8h 55m1 stop
C$ 342WestJet
Find Deal
Fri, 29 Aug - Mon, 8 Sep
WestJet Logo
6:00 a.m. - 1:59 p.m.YKF-SFO
10h 59m2 stops
WestJet Logo
12:50 p.m. - 12:46 a.m.SFO-YKF
8h 56m1 stop
C$ 343WestJet
Find Deal
Sat, 7 Jun - Tue, 19 Aug
 Logo
6:00 a.m. - 12:05 p.m.YKF-SFO
9h 05m1 stop
 Logo
7:30 a.m. - 5:15 a.m.SFO-YKF
18h 45m1 stop
C$ 428
Find Deal
Thu, 8 May - Thu, 15 May
Flair Airlines Logo
9:25 a.m. - 9:30 a.m.YKF-SFO
27h 05m1 stop
Flair Airlines Logo
10:15 a.m. - 7:10 a.m.SFO-YKF
17h 55m1 stop
C$ 453Flair Airlines
Find Deal
Mon, 5 May - Fri, 9 May
Flair Airlines Logo
9:25 a.m. - 9:30 a.m.YKF-SFO
27h 05m1 stop
Flair Airlines Logo
10:15 a.m. - 7:25 p.m.SFO-YKF
30h 10m1 stop
C$ 457Flair Airlines
Find Deal
Sun, 1 Jun - Sun, 8 Jun
Flair Airlines Logo
6:00 a.m. - 9:30 a.m.YKF-SFO
30h 30m2 stops
Flair Airlines Logo
10:15 a.m. - 5:30 a.m.SFO-YKF
16h 15m2 stops
C$ 565Flair Airlines
Find Deal
Sun, 25 May - Fri, 30 May

KAYAK's insights & trends for Region of Waterloo Intl to San Francisco flights

Get data-powered insights and trends into flights from Region of Waterloo Intl to San Francisco to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Toronto Region of Waterloo Intl Airport to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Toronto Region of Waterloo Intl Airport to San Francisco is February, where tickets cost C$ 355 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is C$ 715 and C$ 691 respectively.

Good to know

Low season

November

High season

July

Cheapest flight

C$ 170
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (6% more expensive on average)
Flight from Toronto Region of Waterloo Intl to San Francisco

When to book flights from Region of Waterloo Intl to San Francisco

Are your dates flexible? Find out the best times to travel from Region of Waterloo Intl to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Toronto Region of Waterloo Intl to San Francisco flights

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

    In the last 3 days, the lowest price for a flight from Toronto Region of Waterloo Intl Airport to San Francisco was C$ 123 for a one-way ticket and C$ 226 for a round-trip.

  • Which aircraft models fly most regularly from Toronto Region of Waterloo Intl to San Francisco?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Toronto Region of Waterloo Intl to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Toronto Region of Waterloo Intl to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Toronto Region of Waterloo Intl to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Toronto Region of Waterloo Intl is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Toronto Region of Waterloo Intl to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Toronto Region of Waterloo Intl with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Toronto Region of Waterloo Intl to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Toronto Region of Waterloo Intl up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from Region of Waterloo Intl to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Toronto to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Region of Waterloo Intl to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
WestJetOverall score based on 2816 reviews
7.4Boarding
7.9Crew
6.2Food
7.0Comfort
6.1Entertainment
Airline reviews

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

2.0 MediocreDoha, Apr 2025YYZ - YVR
Read more WestJet reviews

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

Very good over all , would have been nice to have entertainment on the flight

Absolutely the worst airline I have ever taken. They lost my baggage and told me my bag tags had been cancelled. When my bags arrived days later I had to pick them up at 3:15 am. My return flight was delayed another 6 hours and they broke my bag. Westjet does nothing to try and make it a better customer experience and all the customers services representatives I spoke with were useless and incompetent. Never flying westjet again.

Easy self checkin and baggage drop. No in seat entertainment, but wifi and app worked well

Single flights to Cancun purchased through third-party, initially had issues printing luggage labels with the lady at the airport Pearson… Was super friendly and assisted quickly despite being very busy

Very old planes. Seats were not comfortable. Air was not on during the flight leading to incredibly stuffy conditions.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

Terrible all around. Flight was late and airplane was very uncomfortable. The crew were unhelpful and hid in the back. Did zero work. No entertainment.

I booked and paid extra for exit door seats also pre paid for my luggage air Canada changed plains and I never got what I paid for and they made me pay for luggage again they also did this to my wife. They are the most unorganized company I have ever dealt with. I am sure I will never see the extra money I paid for the seats or the recharge for the luggage. They are subsidized by the taxpayers and don’t give a dam just a horrible way to do business

Your crew was so so so wonderful Only thing sound be great if you kept some phone chargers and converters rest 👌👌👌👌

The speakers were way too loud. Music was played during boarding too. This noise could've been avoided.

The TSA people or whatever you call them were a bit rude- I asked why I had to take my shoes off bc I'm 75 and in the USA, I don't have to. The man didn't need to snap at me. It wasn't even busy! The plane was ok, a bit small for such a long flight, but I'm very familiar with the 737 used ( I fly it often between SFO and SAN) service was ok-nothing special. If I drank alcohol I guess I would be happy with free choices. the plane was HOT and even the FA commented on it. They tried to get it cooler, but it never happened.

Multiple change of the gates at Pearson, delayed flight was extremely uncomfortable.

Easy boarding, punctuality, decent service. I can only complain about the measly snack.

Never made this leg of the flight since we rebooked through United instead. Did not make it to immigration/US custom due to the delay. Had to spend the night on our own dime in Toronto

Everything you need to know for your flight from Region of Waterloo Intl to San Francisco

Information on your arrival and departure airports

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