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Cheap Flights from San Francisco to Ontario

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Toronto
Torontononstop$288
Ottawa
Ottawa1 stop$410
Thunder Bay
Thunder Bay2 stops$471
London
London2 stops$521
Windsor
Windsor2 stops$487
Sudbury
Sudbury1 stop$511
Sault Ste Marie
Sault Ste Marie1 stop$888
Toronto
Torontononstop$288
Ottawa
Ottawa1 stop$410
Thunder Bay
Thunder Bay2 stops$471
London
London2 stops$521
Windsor
Windsor2 stops$487
Sudbury
Sudbury1 stop$511
Sault Ste Marie
Sault Ste Marie1 stop$888
Booking Insights

Price, demand and travel trends for San Francisco to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What are the cheapest fares from San Francisco to Ontario recently?

The cheapest fare from San Francisco to Ontario in the last week was $288 round-trip, to Toronto Pearson Intl (YYZ).

How do fares into airports in Ontario compare?

According to KAYAK data from the last 12 months, the cheapest airports to fly into Ontario from San Francisco are:

• Hamilton (YHM) (avg. price $477)
• Toronto Pearson Intl (YYZ) (avg. price $545)
• Thunder Bay (YQT) (avg. price $581)

Are flights from San Francisco to Ontario cheaper or more expensive than last year?

Fares from San Francisco to Ontario are about the same as they were in November last year, averaging $493 round-trip.

What's the cheapest month to fly from San Francisco to Ontario?

January is typically the cheapest month to fly from San Francisco to Ontario, with round-trip fares averaging $423. December and July are usually the most expensive, averaging $619 and $597, respectively.

How do fares from San Francisco to Ontario vary by day of the week?

On average, Tuesday is the cheapest day to fly from San Francisco to Ontario and Sunday is the most expensive. Looking at the past 12 months of KAYAK data, it's 5% more expensive to fly on a Sunday compared to Tuesday.

What's the best time of day to fly from San Francisco to Ontario?

It's cheapest to fly to Ontario in the evening with average prices of $467. The night is the most expensive time to fly, with average prices of $613.

What's the best time to book a flight from San Francisco to Ontario?

Book your flights 14 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 46% compared to booking at the last minute (within 2 weeks of departure).

Key details for San Francisco to Ontario flights

Low season

February

Cheapest flight

$147
Beat the crowds with an average 47% drop in travelers.
The most popular month to fly with an average 60% increase in travelers.
One-way flight from San Francisco to Toronto Pearson Intl Airport

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

Insights shared by verified travelers who flew the route from San Francisco to Ontario 
JendanFlew with Porter Airlines-Mar 2025
Make sure you have an online streaming option to help the time pass faster.
Verified travelerFlew with United Airlines-Sep 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.
Verified travelerFlew with Porter Airlines-Mar 2024
Be on time, don’t carry so much cumbersome baggage on board.

Your San Francisco to Ontario flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from San Francisco to Ontario?

    Yes. Fares from San Francisco to Ontario are low right now. As a rule of thumb, a round-trip under $444 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from San Francisco to Ontario?

    Over the past 12 months, round-trip fares from San Francisco to Ontario have typically cost between $444 and $716.

  • What are the main airports serving Ontario?

    Ontario has 35 airports. 94% of KAYAK users choose Toronto Pearson Intl (YYZ) as their arrival airport.

  • Which airlines fly nonstop from San Francisco to Ontario?

    Based on the flight schedule for the next 3 months, 3 airlines offer nonstop flights on this route:

    • Air Canada
    • United Airlines
    • Porter Airlines

  • Which destinations in Ontario can I fly nonstop from San Francisco?

    Based on the flight schedule for the next 3 months, you can fly nonstop from San Francisco to just one destination in Ontario: Toronto.

  • Is it cheaper to fly with a layover from San Francisco to Ontario?

    Yes, nonstop flights from San Francisco to Ontario average $555 over the past 12 months, but flights with a layover can cost less. The most affordable connecting airports are:

    • Seattle/Tacoma Intl (SEA) (avg. price $344)
    • Calgary (YYC) (avg. price $474)
    • Las Vegas Harry Reid Intl (LAS) (avg. price $492)

  • How long is a flight from San Francisco to Ontario?

    Nonstop flights from San Francisco to Ontario take 4h 54m on average. All flights fly into Toronto Pearson Intl (YYZ).

  • Which cabin classes are available from San Francisco to Ontario?

    On flights from San Francisco to Ontario you can book Economy Class, Premium Economy Class, Business Class or First Class.

  • What are some popular landmarks around Ontario?

    Ontario is home to many popular sights. KAYAK travelers' favorites include:

    • Rogers Centre
    • Union Station
    • Scotiabank Arena
    • CN Tower

  • What are the earliest and latest flights from San Francisco to Ontario?

    The earliest nonstop flight from San Francisco to Ontario departs at 8:00 am and the latest leaves at 11:29 pm. Nonstop flights take about 4h 54m.

Your guide to booking San Francisco to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 14 weeks before your trip. KAYAK data shows fares in this window are around 46% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • Flexible with your dates? Fly in January to save some money. It's typically the cheapest month on this route, while flights in December will cost you the most.
  • Fly out on a Tuesday to get the cheapest fares. Avoid Sunday flights, which are about 5% more expensive.
  • If you're watching your budget, fly into Hamilton (YHM) which has the lowest average airfare in the region. Just remember to budget for any onward travel by bus, car or domestic flight.
  • Start your trip in Toronto, the most popular destination in Ontario. From there, it's easy to continue on to other popular spots such as Niagara Falls, Ottawa and Mississauga.
  • Time or money? If speed matters most, fly from San Francisco to Toronto Pearson Intl (YYZ). If you're after the lowest fares, Hamilton (YHM) is usually your best bet.

Reviews of the top 5 airlines serving from San Francisco to Ontario

 
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 468 reviews
6.9Entertainment
7.6Food
8.6Crew
8.2Boarding
8.0Comfort
Airline reviews

A few improvements: 1. No signages at the airport that the porter airline was a codeshare and i could check-in at American counter. 2. Crew at the gate said they couldn't change my reward to Alaska - despite that being done previously 3. Despite there being many open seats, i was assigned a seat at the very back near lavatory, last row. Fortunately, the pilot wanted more people moved up so the flight attendants moved me up. It seemed very odd to have been stuck in last row with very few people nearby..

6.0 GoodHarsh, Apr 2026
Read more Porter Airlines reviews

A few improvements: 1. No signages at the airport that the porter airline was a codeshare and i could check-in at American counter. 2. Crew at the gate said they couldn't change my reward to Alaska - despite that being done previously 3. Despite there being many open seats, i was assigned a seat at the very back near lavatory, last row. Fortunately, the pilot wanted more people moved up so the flight attendants moved me up. It seemed very odd to have been stuck in last row with very few people nearby..

The flight booking code given by Kayak was not the correct one used by the airline. I had to call to get the correct one. It was never sent to me. Totally unacceptable!

Much roomer than air Canada! Great flight for the price. No complaints

As a first time flyer with Porter I was happy with the service and comfort of the airline.

Other than wifi no on board entertainment. Will use them again, roomier seats than other airlines and snacks and beverages, better than average

I like it, but the food isn't good. They need to offer more simple things. This bowls that have so many things your don't know what your are eating. The milenials like it, no the rest. And last but not least, they allowed somebody have a huge dog, vey agressive and fidgety in the flight. That's horrible. No animals should be allowed inside the airplane, what about allergies, etc

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.

Flight delayed by half hour, causing rush to get to connecting flight in Toronto Pearson which doesn’t have good flow for managing immigration check and connections.

Crew is ok. They offered food n drinks. Had difficulty connecting to wifi on board.

Flight was smooth and comfortable. The crew were exceptional. Amanda, Nichole and Hershel were attentive to our every need. So friendly. My daughter and I were surprised at quality of service. Loved the double row seating. Snacks were delicious. We would definitely fly with Porter again. Flight PD 670 SFO to YYZ Thank you so much for the best flight experience we have had

I used by Skymiles to upgrade to First so that I could comfortably work using my laptop. But WiFi was intermittent and unavailable for long periods. I feel like I wasted 70,000 miles :(

Everything was pretty good. I would like to have more drinks (water) during four hours of the flight.

WiFi was a major problem and if it does not work on a 4 hour flight then that lowers the overall experience

The Airline Attendant found us in flight and moved us to seats in the front of economy due to the short time we would have to make our connecting flight. We really appreciated it.

Carmen was an absolute delight on the flight staff! Everyone was lovely and made it a very pleasant flight.

Internet connectivity still seems to be touchy on these flights, making it difficult to rely on it for getting work done.

My son’s suitcase was left behind at SFO and did not make the flight.

Crew was absolutely fantastic and we’re so welcoming and friendly ❤️

Flight delayed four separate times. I’m now one hour hours late to landing.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Check in went smoothly. Flight attendant who was assigned my area barely paid any attention to me! She acted as though she was extremely busy and flustered. Maybe she was new?! I told her to change the language on my screen, she said she’d come back to help me but never did so I was able to solve the problem on my own. She came back and said she’d made adjustments on her end. Highly doubt it because I found the setting to change the language! Also, I noticed everyone was eating before we landed so I pushed my help button and she never came so I got up to find her to ask her if I can have breakfast. She said they are not serving breakfast but I can have a sandwich. Yes, that was her response as I saw everyone eating breakfast!!!

New Max 10, first class seats have been shrunk. End of a 20 hour journey, it was United not Lufthansa, just glad to get home

Excellent communication from the staff. We actually arrived early. Very friendly and professional staff.

Some crew were unfriendly or in some cases just straight up rude.

Entertainment kept turning itself off. Gave up on watching a movie.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Basics were there, but a 5:15 flight with almost no food ans no entertainment, it is quite long.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Due to delays at SFO, my WestJet light missed its connecting WestJet flight. If they had held the plane in Calgary for 15 minutes, 2 families with children would not have been stranded in Calgary for more than 24 hours. I understand the need to be on-time, but when it is the same company, you would think they could make a phone call. Or maybe they could go to a higher altitude to make up for lost time? Instead of attempting to put us on another flight, they rescheduled us for the same connecting flight 24 hours later. We then had to scramble to find a hotel, which they state that they were not responsible for since the delay was not their fault and therefore became an additional out of pocket expense for us. The customer service is severely lacking here at this company. They also mentioned that if we purchased our tickets through a 3rd party site (Kayak) versus WestJet directly, that they couldn't help us. Seriously?? Additionally, we lost 2 days of travel and missed out on tours and taxis that were pre-booked. I will not be using WestJet again,

Westjet was late and we missed our connecting flight with Cathay. Had to wait 8 hours. Westjet only allows 1 checked in baggage for international flights- it’s always been 2. Canada allows only 1 sandwhich bag size full off small liquids. Everything else will be tossed. Awful trip. Will never fly west jet or go to Toronto to connect flights!

They lost my bag. Hopefully it will be here tomorrow.

Kayak was the problem! The tickets we bought did not allow for carry on or checked luggage and we ended up paying more for those services than the tickets! The paperwork Kayak provided for the receipt left the luggage policy for Westair intentionally blank. This was intentionally decietful on Kayak's part. Our additional cost was over $400.00! I will be calling customer service today asking for refunds and I will keep you informed on any review sites as I can. Keith

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

Trip was uneventful which is good. Boarding took a long time due to many disabled/elderly requiring assistance which again is fine. Landing and take off were excellent. Food and entertainment were as expected, bring your own if you have preferences otherwise you get what you get.

The flight was on time - which is good. But pretty much every other aspect of the experience was bad. They charged 55$ for a carry on bag!

Flight was old and the seats were not comfortable at all. They made me pay 55$ to take my carry-on bag onboard.

The seats were very comfortable. However the meal on the transatlantic portion of the trip was not very good, even by airline food standards.

They made my minor daughter leave the area and go back though security during a flight connection with her checked luggage

Way to go Air Canada, Bravo!! I like to give credit where credit is due. My departuring flight was horrible, but the return was much appreciated. The boring was smooth, the air craft was up to date. Bluetooth connectivity, great entertainment and the crew was decent. I wouldn’t say “friendly”but nice enough. It was a pleasant experience.

Announcements were unintelligible. Entertainment system was non-existent. Ground crew kept changing story for flight delay.

Amazing and light experience, boarding on time, crew is super nice, clean salon and special thanks for movies availability. Provided by United Airlines

737-8 Max is an awful design. Toilets in the rear are inaccessible for most of the flight due to service carts.

No TV on the flight. The charging outlet was not working. No food, even a sandwich. The served orange was poor quality.

I was charge a baggage checking fee $68!! I volunteered to check my duffle bag which usually goes under my seat!

Very rude gate attendants in San Francisco who didn’t let me bring my little carry on (smaller than usual size) and after boarding I realized that there still were a lot of overhead compartment space (like a full section available in some spots). That made me lose 30 minutes at my destination at 1am and it could have broken something fragile that I had in it

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

Bad experience boarding and flight got delayed didn’t make it to my next flight

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

More options for your flight from San Francisco to Ontario

Complete your trip to Ontario with a hotel stay or car rental