C$ 126 Find Cheap Flights from San Francisco to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Ontario departing on 13/5. 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 Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Ontario, 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 San Francisco to Ontario, as well as popular online travel agencies
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Best Ontario Flight Deals from San Francisco

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Toronto
Toronto2 stopsC$ 341
Ottawa
Ottawa2 stopsC$ 381
London
London1 stopC$ 440

Cheap Flight Deals from San Francisco to Ontario (SFO-CAON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Ontario 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 San Francisco to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from San Francisco to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
 Logo
6:00 a.m. - 10:54 p.m.SFO-YYZ
13h 54m2 stops
 Logo
9:45 a.m. - 9:21 p.m.YYZ-SFO
14h 36m1 stop
C$ 341
Find Deal
Wed, 4 Jun - Wed, 11 Jun
 Logo
1:09 p.m. - 6:54 a.m.SFO-YYZ
14h 45m2 stops
 Logo
9:45 a.m. - 9:21 p.m.YYZ-SFO
14h 36m1 stop
C$ 342
Find Deal
Wed, 28 May - Wed, 11 Jun
WestJet Logo
7:30 a.m. - 6:56 p.m.SFO-YKF
8h 26m1 stop
WestJet Logo
6:00 a.m. - 1:59 p.m.YKF-SFO
10h 59m2 stops
C$ 349WestJet
Find Deal
Tue, 22 Jul - Sat, 26 Jul
WestJet Logo
7:30 a.m. - 6:56 p.m.SFO-YKF
8h 26m1 stop
WestJet Logo
6:00 a.m. - 1:59 p.m.YKF-SFO
10h 59m2 stops
C$ 353WestJet
Find Deal
Tue, 15 Jul - Tue, 12 Aug
Air Canada Logo
10:56 p.m. - 9:18 a.m.SFO-YXU
7h 22m1 stop
Air Canada Logo
3:35 p.m. - 9:37 p.m.YXU-SFO
9h 02m1 stop
C$ 458Air Canada
Find Deal
Sat, 14 Jun - Mon, 16 Jun
Porter Airlines Logo
1:30 p.m. - 12:37 a.m.SFO-YUL
8h 07m1 stop
Porter Airlines Logo
6:45 a.m. - 12:30 p.m.YUL-SFO
8h 45m1 stop
C$ 508Porter Airlines
Find Deal
Wed, 28 May - Mon, 2 Jun
Porter Airlines Logo
1:30 p.m. - 9:29 p.m.SFO-YYZ
4h 59mdirect
Porter Airlines Logo
9:45 a.m. - 12:30 p.m.YYZ-SFO
5h 45mdirect
C$ 515Porter Airlines
Find Deal
Mon, 9 Jun - Sun, 15 Jun
Air Canada Logo
4:50 p.m. - 12:51 a.m.SFO-YYZ
5h 01mdirect
Air Canada Logo
7:20 p.m. - 10:02 p.m.YYZ-SFO
5h 42mdirect
C$ 517Air Canada
Find Deal
Wed, 11 Jun - Tue, 17 Jun
United Airlines Logo
10:45 p.m. - 2:58 p.m.SFO-YXU
13h 13m2 stops
United Airlines Logo
3:35 p.m. - 9:37 p.m.YXU-SFO
9h 02m1 stop
C$ 518United Airlines
Find Deal
Sat, 14 Jun - Mon, 16 Jun
United Airlines Logo
11:55 p.m. - 8:24 a.m.SFO-YUL
5h 29mdirect
United Airlines Logo
8:05 a.m. - 11:15 a.m.YUL-SFO
6h 10mdirect
C$ 593United Airlines
Find Deal
Sat, 7 Jun - Fri, 20 Jun

KAYAK's insights & trends for San Francisco to Ontario flights

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

What is the cheapest San Francisco to Ontario flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from San Francisco to Ontario.
The cheapest ticket to Ontario from San Francisco found in the last 72 hours was to Toronto, at C$ 257 round-trip. The most popular route is from San Francisco (SFO) to Toronto Pearson Intl Airport (YYZ), and the cheapest round-trip airline ticket found on this route in the last 72 hours was C$ 257.

What is the cheapest time of day to fly to Ontario?

The average price for all round-trip flights from San Francisco to Ontario depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Ontario is generally in the evening, when round-trip flights cost C$ 373 on average. Morning departures are around 38% more expensive than evening flights, on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 514.

Can I save money by flying with a layover from San Francisco to Ontario?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of C$ 1,030, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from San Francisco to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Ontario, 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 San Francisco to Ontario is February, when tickets cost C$ 486 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is C$ 852 and C$ 723 respectively.

What’s the cheapest day of the week to fly from San Francisco to Ontario?

The average price of all round-trip flights from San Francisco to Ontario clicked on KAYAK for each day over the last 12 months.
When flying from San Francisco to Ontario, you should consider leaving on a Friday and avoid Tuesdays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Fridays and the most expensive ones on Sundays.

How far in advance should I book a flight from San Francisco to Ontario?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below-average price on the flight from San Francisco to Ontario, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low season

January

High season

June

Cheapest flight

C$ 126
Best time to beat the crowds (31% less expensive on average)
Most popular time to fly (33% more expensive on average)
Flight from San Francisco to Toronto Pearson Airport

Flights from San Francisco to Ontario: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from San Francisco to Ontario 
JendanFlew with Porter AirlinesSFO-YYZMar 2025
Make sure you have an online streaming option to help the time pass faster.
Verified travelerFlew with United AirlinesSFO-YYZSep 2024
If you do not find enough space for your personal belongs( bags or luggage), you can ask the crew for help. They are kindly and friendly, and they can help you.
ElizabethFlew with Air CanadaSFO-YYZMay 2024
When delayed happened I would suggest for the crew to let passengers board in and just wait for the one crew missing to arrive and joined the crew as soon as crew member arrives other than passengers waiting this helps time consuming . And passenger not rushing for connecting flight.
Verified travelerFlew with Porter AirlinesSFO-YYZMar 2024
Be on time, don’t carry so much cumbersome baggage on board.

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from San Francisco to Ontario?

    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 San Francisco to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from San Francisco to Ontario 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 San Francisco to Ontario?

    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 from San Francisco to Ontario with an airline and back with another airline.

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

    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 from San Francisco to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Ontario

  • Looking for a cheap flight? 25% of our users found tickets from San Francisco to the following destinations at these prices or less: Montreal C$ 265 one-way - C$ 267 round-trip; Toronto C$ 228 one-way - C$ 476 round-trip

Top 5 airlines serving from San Francisco to Ontario

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Ontario. 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 San Francisco to Ontario? 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.
8.0
Porter AirlinesOverall score based on 285 reviews
8.1Comfort
8.2Boarding
7.0Entertainment
8.8Crew
7.6Food
Airline reviews

I love the 2 seats per row. More room. The crew were excellent.

10.0 ExcellentAnonymous, Apr 2025YHZ - YOW
Read more Porter Airlines reviews

I love the 2 seats per row. More room. The crew were excellent.

It was amazing although they did bump us up to the front which gave us more leg room and a meal. The service was great! The staff were friendly. :)

Overall very good... staff were friendly and helpful. boarding was good for the most part, but a little hard to get our carry-on bags on there.... I think people should be directed to keep their coats and small bags with them until all the carry-ons are loaded, and then, if there is space, they can put their small bags and coats up top.. makes it much easier to put baggage up. i loved the internet feature, but the entertainment was not there unless you have your own Netflix or similar platform. My chair did not recline, which was very annoying, and the arms won't go up near the isle, which makes it tough to get in and out of the seat.

Staff were excellant. Only snacks served. Some turbulence so we were offered Free beer or wine.

The staff is always great. Just the fact that our flight was the only one delayed from Halifax when all other carries were still flying. It happen a year ago out of Toronto as well. All others were flying but our flight got cancelled 1 hr before the time of departure.

The only issue had when i mentioned about comfort was the man beside me was on the larger side and took about 1/3 of my seat where i was pressed against the wall/window of the plane for the trip.

The check-in staff, boarding staff, and flight crew were all very friendly. Really miss the Porter lounge in Ottawa.

Thanks for giving a beer to everyone in the seat infront of me and then telling me that I can’t have one because they are going to land. I guess I need to pay for a seat and then pick one in the very front of the plane

The flight was delayed by more than one hour. The terminal was consequently overcrowded and hot. We lost our car reservation and hit rush hour traffic in Boston, which added two hours stuck in traffic to our trip.

Awesome, the whole way through. Thank you, this is the new Canadian Airline benchmark.

Over the wing seat at emergency exit only downside people using lavatory have no respect and wait in the space

Flight delayed any hour and couple of big gate changes

The pilot came out and chatted with the passengers. He explained why there was a slight delay. The crew was excellent. Very helpful. I had to buy meals for my whole family and they were in different seats, so the crew had to deal with that. They were very pleasant and accommodating and did a great job!

We were unable to land in Liberia. It was not the airline’s fault, but we had to be diverted to SJO.

We had things stolen from our luggage, we also were refused an upgrade on a flight that was not full.

When we left, it wasn't Great . People were drinking heavily, very disrespectful Extremely loud, the entire trip. I think the crew members, should have get their attention. Coming back was great.

I sat in the club. The seeds were fantastic. The meal was great and Entertainment was good. The crew was fantastic. I recommend it to everybody.

The food was small portions and not fresh. I was seated at the back of the plane so by the time the cart approached me most of the food options were sold out. The cabin crew was fantastic however.

Great flight and crew. Food isn't free and neither are headphones...

We were in economy class but paid for option Plus which offer you an extra snack after take off, free earplugs & blanket. The crew were very attentive. The comfort however wasn’t great, hard to be comfortable in such restraint place. Wasn’t able to sleep through out the 7hrs flight and was exhausted upon arrival.

Compared with other carriers business class for an overnight was not worth the extra expense.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

AWFUL. I have had the experience of traveling with many airlines across the world, and hands down United Airlines is the worst. Not one flight was on time, and I don’t think I met one crew member or staff member who wasn’t rude.

For an 8.5 hour flight the service on board lacked a bit. Service start was slow, the food was worse than usual and they skipped the snack they were supposed to deliver before landing.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

Checkin was painful and slow! Lady didn’t seem to know what was going on and couldn’t explain the delay. Seemed ahe couldnt see the computer scree and we couldn’t hear her talk through her mask.

Plane left & arrived early- 5 Crew great. Wi fi - paid for 2, only 1 worked - so so. Waste of $. Coolie was good

There was no USB plug in my section of the plane. So I could not charge my phone. Also, there was no screen to watch movie or anything like that. Wish I had known that in advance, I would’ve brought my iPad.

Plane changed to one with no entertainment system or ability to serve hot meals

Flight was delayed 3 times. Then cancelled due to pilot being timed out. They refused hotel vouchers. Gate attendants were very rude and could not help you at all.

No access to any entertainment No food other than a cookie or pretzels even tho flight was over the supper hour Seats very close together and very little leg room Staff was very good

Horrible. I checked out myself that it seems that I can have a free carry-on. But they ask me to pay $75 when we are nearly boarding. It was tricky during check out that make you mistake that you can have a carry-on beside your personal item. Also they ask $75 in the airport instead of $35 during checkout. So the whole process is designed to make you this mistake

Plane should have entertainment, instead of people paying to use wifi

The cancelation of my flight from Toronto to Edmonton without any solution given to me for my next flight. Very poor connection from Toronto to Edmonton

Too squished in seats. I'm 110 lbs and 5'6....can't imagine being any bigger and flying

Flight was delayed. Arrived in Vancouver at 3 am. Not a great experience.

Original flight canceled and communicated poorly. A series of gate changes , delays and plane changes followed. Even after the entire flight boarded there was another plane changes followed. Food vouchers provided to my travel companion but not to me despite being on the same reservation. No in flight entertainment. The entire experience was terrible although the flight crew were great.

Flight was on time. Online check in capabilities made things quick and easy. Zone boarding was enforced, which I appreciate. Everyone was not lining up ahead of their zone being called. Crew was professional and friendly.

Poor air traffic controller staffing led to a 50%reduction on flights so we got to wait 4 hrs for our flight! Very disorganized at the gate Poor communication with customers

No Charging ports for personal electronics, which were required to use wifi entertainment.

They are a great airline, and i enjoying flying with them. However my experience with booking through Kayak was a horrible experience. With all the restrictions and glitches of website. My entire bookings by kayak was wrong. And there was no possible way of fixing anything with them, because they hand over responsibility to the airline after purchase is made. Will not be booking through Kayak again and will inform my family and friends not to as well.

I liked nothing about this flight nor the incredible lack of service and communication on this flight from the Captain to every staff member. Arrogant, entitled and lacking any kind of basic customer service

I booked my flight ni November and was placed on standby? How does this happen. Flight was 1 1/2 hours late departure plane was switched to a smaller plane easy to tell this is a government run company they don’t care about anyone

Excellent crew, great food despite catering issues. We need more people like this.

1. The PA system was painfully loud. 2. Overhead bin #33 was missing—I find this troubling.

This leg was run by United. Food was ok and the regular menu was actually not good ( Hindu meal was fine). Crew was fantastic

The fact that we have to check in our carryons when we met the requirements and there was plenty of spaces near we sat was ridiculous

Problem with operation of on board entertainment computer. Failed about 1 /2 hour into the flight. Rebooting failed to restore.

Everything you need to know for your flight from San Francisco to Ontario

Information on your arrival and departure airports

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