YKF - SFO

C$ 254 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 10/3. 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, 0 bags

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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
C$ 375
WestJet
Thu 23/4Mon 27/4
YKF - SFO • 1 stop
Cheapest one-way flights
C$ 254
Multiple Airlines
Tue 10/3
YKF - SFO • 2 stops
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

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, 23 Apr - Mon, 27 Apr
WestJet Logo
6:20 a.m. - 12:10 p.m.
YKF
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 7:50 p.m.
SFO
-
YKF
10h 50m
1 stop
C$ 375WestJet
Sun, 26 Apr - Sat, 2 May
WestJet Logo
8:40 p.m. - 9:55 p.m.
YKF
-
SFO
28h 15m
1 stop
WestJet Logo
1:00 p.m. - 7:50 p.m.
SFO
-
YKF
27h 50m
1 stop
C$ 395WestJet
Mon, 15 Jun - Mon, 22 Jun
WestJet Logo
8:40 p.m. - 9:55 p.m.
YKF
-
SFO
28h 15m
1 stop
WestJet Logo
12:50 p.m. - 12:45 a.m.
SFO
-
YKF
8h 55m
1 stop
C$ 424WestJet
Wed, 6 May - Mon, 11 May
WestJet Logo
8:40 p.m. - 12:00 p.m.
YKF
-
SFO
18h 20m
1 stop
WestJet Logo
6:00 a.m. - 7:50 p.m.
SFO
-
YKF
10h 50m
1 stop
C$ 432WestJet
Tue, 3 Mar - Fri, 6 Mar
WestJet Logo
6:20 a.m. - 12:10 p.m.
YKF
-
SFO
8h 50m
1 stop
WestJet Logo
1:00 p.m. - 5:29 a.m.
SFO
-
YKF
13h 29m
1 stop
C$ 467WestJet
Tue, 16 Jun - Mon, 22 Jun
WestJet Logo
8:40 p.m. - 12:00 p.m.
YKF
-
SFO
18h 20m
1 stop
WestJet Logo
12:50 p.m. - 12:45 a.m.
SFO
-
YKF
8h 55m
1 stop
C$ 513WestJet
Fri, 27 Feb - Sun, 1 Mar
Multiple Airlines Logo
7:05 a.m. - 9:30 a.m.
YKF
-
SFO
29h 25m
2 stops
Multiple Airlines Logo
10:15 a.m. - 5:29 a.m.
SFO
-
YKF
16h 14m
2 stops
C$ 515Multiple Airlines
Wed, 29 Apr - Mon, 4 May
WestJet Logo
8:40 p.m. - 12:00 p.m.
YKF
-
SFO
18h 20m
1 stop
WestJet Logo
6:00 a.m. - 7:50 p.m.
SFO
-
YKF
10h 50m
1 stop
C$ 524WestJet
Sun, 26 Apr - Sat, 2 May
Multiple Airlines Logo
6:10 a.m. - 12:00 p.m.
YKF
-
SFO
32h 50m
2 stops
Multiple Airlines Logo
1:00 p.m. - 12:45 a.m.
SFO
-
YKF
32h 45m
1 stop
C$ 525Multiple Airlines
Thu, 23 Apr - Tue, 28 Apr
WestJet Logo
6:20 a.m. - 12:10 p.m.
YKF
-
SFO
8h 50m
1 stop
WestJet Logo
1:00 p.m. - 7:50 p.m.
SFO
-
YKF
27h 50m
1 stop
C$ 539WestJet
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.

What is the most popular layover airport when flying from Toronto Region of Waterloo Intl to San Francisco?

Percentage of one-stop round-trip flights from Toronto Region of Waterloo Intl to San Francisco chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Calgary (YYC) is the top choice – 60% of KAYAK users who clicked on one-stop flights from Toronto Region of Waterloo Intl to San Francisco picked an itinerary connecting there.

What is the cheapest layover airport when flying from Toronto Region of Waterloo Intl to San Francisco?

Average round-trip price for one-stop flights from Toronto Region of Waterloo Intl to San Francisco clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of C$ 341.

Which layover airport offers the shortest total travel time from Toronto Region of Waterloo Intl to San Francisco?

Shortest average total travel time for one-stop one-way flights from Toronto Region of Waterloo Intl to San Francisco via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Toronto (YYZ) for the shortest journey. The average one-way travel time for flights connecting there is 8h 35m.

Which layover airport has the quickest connection when flying from Toronto Region of Waterloo Intl to San Francisco?

Average layover duration at different layover airports for one-stop one-way flights from Toronto Region of Waterloo Intl to San Francisco, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Toronto (YYZ) often has the shortest layovers from Toronto Region of Waterloo Intl to San Francisco, with an average of 2h 03m.

Good to know

Low seasonOctober
Cheapest flightC$ 254
Best time to beat the crowds (26% less expensive on average)
Most popular time to fly and prices are also 11% 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$ 254 for a one-way ticket and C$ 375 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 airline alliances offer flights from Toronto Region of Waterloo Intl to San Francisco?

    Star Alliance is the only airline alliance operating flights between Toronto Region of Waterloo Intl and San Francisco.

  • 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$ 364 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$ 467 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 3253 reviews
6.2Food
7.0Comfort
7.4Boarding
7.9Crew
6.1Entertainment
Airline reviews

Flight left on time. The crew was very friendly. I had to buy a proper meal. Small cookie and a drink just doesn’t cut it for a 4.5 hours flight.

8.0 ExcellentA.K, Jan 2026
YYZ - RTB
Read more WestJet reviews

Flight left on time. The crew was very friendly. I had to buy a proper meal. Small cookie and a drink just doesn’t cut it for a 4.5 hours flight.

Experience was good, the wifi hook up is somewhat tough

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

I will not be flying with westjet again. I was uncomfortable in my seat. The position made my back hurt so bad. My wife was able to fit the seatbelt around her with out an extension but was unable to put the tray table down or fit in the seat for that matter. Our bag was smashed and I spent two hours trying to fill out the application for a damaged bag before I gave up. The 80 photos I took would not work and nothing telling me the format to upload them as.. I made the mistake of unpacking the bag before taking photos so no claim for me. Next trip to Canada I will have to use air Canada.

My luggage was damaged 1 wheel was out I can't find it nowhere

Took 3 hours to check in and drop off our suitcases. Half of the passengers were still in line by boarding time. The computer systems and staff were very slow. Staff were also disorganized and kept allowing later flights to skip lines. Suitcases were piling on that several other passengers didn't get their suitcases. Then, we were sitting in the plane for 2 hours and were told that the flight was overbooked. We missed our connecting flight and had to fly the following day but with a stop over. Good thing ONE WestJet customer rep was pleasant and actually knew how to do her job when we wanted to rebook to a direct flight. Thank you to Kim at Toronto airport. Terrible experience at PUJ. Won't go back to Dominican Republic.

Great seats, super comfortable, but no in flight entertainment which was a let down

Airplane is too small. Crew, especially the flight attendant who looked after our area, was not at all friendly and a touch authoratative. She may have been the most gruff flight attendant i've come across in 40 years of business travel

I when to Jamaica for my dad funeral and I did not get my luggage from westjet . I add to buy clothes putting me financial debt i did no want to be in Westjet did not call me to apologize are to inquire about my luggage I am still angry about it

Ground staff was not helpful, but staff at the business counter were excellent.

The staff was great and made the long trip easy peasy!

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

The flight was very smooth and good. Boarding was fast, but the staff was just decently friendly.

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

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

Information on your arrival and departure airports