YKF - SFO

C$ 245 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 28/10. 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
1 adult, Economy

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 Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Thu, 9 Oct - Sun, 12 Oct
WestJet Logo
6:00 a.m. - 9:24 p.m.YKF-SFO
18h 24m1 stop
WestJet Logo
12:50 p.m. - 12:45 a.m.SFO-YKF
8h 55m1 stop
C$ 382WestJet
Find Deal
Wed, 1 Oct - Sat, 11 Oct
 Logo
6:30 a.m. - 9:24 p.m.YKF-SFO
17h 54m2 stops
 Logo
12:50 p.m. - 5:30 a.m.SFO-YKF
13h 40m2 stops
C$ 383
Find Deal
Fri, 17 Oct - Thu, 23 Oct
WestJet Logo
6:00 a.m. - 11:54 a.m.YKF-SFO
8h 54m1 stop
WestJet Logo
12:50 p.m. - 12:45 a.m.SFO-YKF
8h 55m1 stop
C$ 393WestJet
Find Deal
Thu, 11 Dec - Sun, 11 Jan
WestJet Logo
6:20 a.m. - 12:12 p.m.YKF-SFO
8h 52m1 stop
WestJet Logo
1:00 p.m. - 5:28 a.m.SFO-YKF
13h 28m1 stop
C$ 404WestJet
Find Deal
Sat, 27 Sep - Sun, 5 Oct
WestJet Logo
6:00 a.m. - 9:24 p.m.YKF-SFO
18h 24m1 stop
WestJet Logo
7:30 a.m. - 12:45 a.m.SFO-YKF
14h 15m1 stop
C$ 411WestJet
Find Deal
Fri, 3 Oct - Sun, 5 Oct
WestJet Logo
6:00 a.m. - 9:24 p.m.YKF-SFO
18h 24m1 stop
WestJet Logo
7:30 a.m. - 12:45 a.m.SFO-YKF
14h 15m1 stop
C$ 419WestJet
Find Deal
Thu, 13 Nov - Sun, 23 Nov
WestJet Logo
6:20 a.m. - 12:12 p.m.YKF-SFO
8h 52m1 stop
WestJet Logo
1:00 p.m. - 5:28 a.m.SFO-YKF
13h 28m1 stop
C$ 424WestJet
Find Deal
Fri, 17 Oct - Fri, 24 Oct
 Logo
6:15 a.m. - 9:24 p.m.YKF-SFO
18h 09m2 stops
 Logo
10:15 a.m. - 5:15 a.m.SFO-YKF
16h 00m2 stops
C$ 435
Find Deal
Sat, 27 Sep - Sun, 12 Oct
WestJet Logo
6:00 a.m. - 9:24 p.m.YKF-SFO
18h 24m1 stop
WestJet Logo
12:50 p.m. - 12:45 a.m.SFO-YKF
8h 55m1 stop
C$ 436WestJet
Find Deal
Thu, 9 Oct - Tue, 14 Oct
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$ 541Flair Airlines
Find Deal

Everything you should know

Top airlines
WestJet
Cheapest • from C$ 382 (round-trip)
WestJet
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
C$ 382
WestJet
Thu 9/10Sun 12/10
YKF - SFO • 1 stop
Cheapest one-way flights
C$ 245
Multiple Airlines
Tue 28/10
YKF - SFO • 2 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Booking Insights

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.

Which airlines provide the cheapest flights from Toronto Region of Waterloo Intl to San Francisco?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Toronto Region of Waterloo Intl to San Francisco were found on WestJet (C$ 382) and Flair Airlines (C$ 541).

Good to know

Low seasonFebruary
Cheapest flightC$ 245
Best time to beat the crowds (26% less expensive on average)
Most popular time to fly and prices are also 22% lower 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$ 177 for a one-way ticket and C$ 276 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.

  • Which is the best airline for flights from Toronto to San Francisco, WestJet or Air Canada?

    The two airlines most popular with KAYAK users for flights from Toronto to San Francisco are WestJet and Air Canada. With an average price for the route of C$ 372 and an overall rating of 7.2, WestJet is the most popular choice. Air Canada is also a great choice for the route, with an average price of C$ 566 and an overall rating of 7.1.

  • 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.

Reviews of the 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 3091 reviews
7.9Crew
7.4Boarding
6.2Food
7.1Comfort
6.1Entertainment
Airline reviews

I like how spacious the plane was but I did not like the fact that there was no entertainment

6.0 GoodSexy, Aug 2025YYZ - KIN
Read more WestJet reviews

I like how spacious the plane was but I did not like the fact that there was no entertainment

In spite of purchasing premium, I felt it was perhaps the most uncomfortable seat I have flown in. The base was either broken or poorly made and had no support. Even placing pillows and blankets on the seat (1D aisle) didn’t help. It made for a long and mostly sleepless six hour flight. Crew also were very loudly talking to each other through the night making it very hard to sleep. It was purchased for the price, so I get the risk, but was not impressed.

The staff at the airport and on the plane were wonderful I especially wanna acknowledge the staff who boarded us at the Calgary airport. The women who helped us board at the airport were incredible… they were so kind and sweet…I very happy with WestJet and I am hoping I can fly more often to Canada.

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Generally good. However. The flight left 30 mins behind schedule with no reason given.

Nothing to like because my inbound flight was cancelled without notification by West Jet or third party, JustFly. I couldn’t take the inbound flight due to cancellation; therefore could not take the outbound flight back.

Not the greatest experience everything was pretty mediocre. My seat was by the washroom in the aisle and was not located well as everyone past each other people were right in my seat and space.

There was a medical emergency that the crew handled very well. There was no “entertainment” of any sort-no movie/music/whatever. Food was typical of airlines: mediocre.

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.

I liked the behaviour of the crew members.The flight was good.

No food to provide, they forgot that, in some cases, people stay at the airport for hours without food. Now, to provide them with food, they have to ask them to pay, because some don't have money. That way, they can't eat.

Flight was cancelled last minute. Had to scramble and purchase a $2000 flight through a separate airlines. Stuck in Toronto two extra days. Missed my first two days on a new job. Had to rent a car for an additional two days. Scrambled to fins a place to live those extra two days. Spent a ton of extra money and lost a lot of money, as well as made a poor impression at work. Difficult difficult difficult

Terrible, return flight was cancelled a night before the flight was scheduled to depart and I was notified by an email and an automated message on their phone line. I’ll never book Air Canada again

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

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 👌👌👌👌

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

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