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ONT - SFO

Find cheap flights from Ontario to San Francisco

1 adult
0 bags
Sat 1/6
Sat 8/6

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario 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 Ontario to San Francisco, as well as popular online travel agencies
In the last 7 days, travellers have searched 43,740,974 times on KAYAK, and here's why:

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Flights from Ontario to San Francisco - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario 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 Ontario to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario 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 Ontario to San Francisco is February, where tickets cost £102 on average. On the other hand, the most expensive months are November and June, where the average cost of tickets is £134 and £126 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to San Francisco, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 83 days before departure.

How many flights are there between Ontario and San Francisco per day?

Each day, there are between 4 and 7 nonstop flights that take off from Ontario and land in San Francisco, with an average flight time of 1h 28m. The most common departure time is 06:00 and most flights take off in the morning. Each week, there are 36 flights. The most frequent day of departure is Saturday, when 19% of all weekly flights depart. The fewest flights depart on a Monday.

Which cabin class options are there for flights between Ontario and San Francisco?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

What’s the earliest departure time from Ontario to San Francisco?

Early birds can take the earliest flight from Ontario at 05:50 and will be landing in San Francisco at 07:15.

What’s the latest departure time from Ontario to San Francisco?

If you prefer to fly at night, the latest flight from Ontario to San Francisco jets off at 20:50 and lands at 22:12.

Good to know - Cheap tickets from Ontario to San Francisco

Low season

January

High season

October
Best time to beat the crowds but there is an average 24% increase in price.
Most popular time to fly and prices are also 13% lower on average.

When to book flights from Ontario to San Francisco

Are your dates flexible? Find out the best times to travel from Ontario to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 flights from Ontario to San Francisco

  • What other airports can I board my flight to SFO other than ONT?

    Apart from ONT, Ontario is served by John Wayne Airport (SNA) and Long Beach Airport (LGB). Of the two, SNA is closer to Ontario than LGB making it the best option if you are looking for something close-by.

  • Where can I breastfeed my child at ONT?

    If you want to breastfeed your baby at ONT, you can do so in one of ONT's two operational nursing rooms. In terminal 2 there’s a nursing room located across from gate 207 and in terminal 4 there is one found across gate 407.

  • Does SFO have a place I can relax once my flight lands?

    Once you land at SFO, you can enjoy the rejuvenating services at one of the three locations operated by XpresSpa. In terminal 3, XpresSpa has a locationnear boarding area E, while the other is found in the boarding area F. The third location is found in the international terminal boarding area G.

  • Can I rent a car at SFO?

    At SFO, you can easily rent a car once you land. To do so, you’ll have to visit the airport’s Car Rental Center, which houses rental agencies like Thrifty, Enterprise, Budget, and Dollar. To get to the airport’s Car Rental Center, you’ll board its AirTrain Blue Line which will take you right there.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to San Francisco?

    All the following airlines offer inflight Wi-Fi service on the Ontario to San Francisco flight route: JetBlue, Alaska Airlines, Delta, American Airlines, Japan Airlines, Lufthansa, and Iberia.

  • Which aircraft models fly most regularly from Ontario to San Francisco?

    The Airbus A320neo is the aircraft model that flies most regularly on the Ontario to San Francisco flight route.

  • Which airline alliances offer flights from Ontario to San Francisco?

    Star Alliance is the only airline alliance operating flights between Ontario and San Francisco.

  • On which days can I fly direct from Ontario to San Francisco?

    There are direct flights from Ontario to San Francisco on a daily basis.

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

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

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

  • What is the Hacker Fare option on flights from Ontario to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to San Francisco with an airline and back to Ontario with another airline.

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

  • Looking for a cheap flight from San Francisco to Ontario? 25% of our users found flights on this route for £30 or less round-trip.
  • To pass through the security checkpoints at Ontario International Airport (ONT), you’ll need to budget a good amount of time. On many occasions, travelers have missed their flights at this airport after being held up at its checkpoints. To avoid finding yourself in a similar situation, the day you’re set to fly to San Francisco International Airport (SFO) from ONT, you should get to the airport at least 2 hours before your flight.
  • If you want to withdraw some cash before departing from ONT, you can do so without hassle from one of the airport's several ATMs. These ATMs are located on the upper and lower levels of terminals 2 and 4, near the front entrance to the international terminal, and in the airport’s car rental facility.
  • While waiting for your flight to San Francisco at ONT, you can purchase a meal of your choice at one of the airport's numerous restaurants. In terminal 2, you can eat at Wolfgang Puck Pizza, Cross Grain Brewhouse, or Harvest & Grounds. In terminal 4, you can eat at Rock & Brews, Wahoo’s Fish Taco, or Coffee Bean & Tea Leaf.
  • If you need to do some work or fax documents once you land at San Francisco International Airport (SFO), you should check out SFO’s business center. Located in the main hall of the international terminal, the center operates from 8 a.m. to 8:30 p.m.
  • In case you want to leave some of your luggage at SFO before proceeding with your journey, you’ll be happy to hear about SFO’s Airport Travel Agency which offers luggage storage services. They are located in the main hall of the international terminal.
See more tips

Prefer to fly direct from Ontario to San Francisco?

Find which airlines fly direct from Ontario to San Francisco, which days they fly and book direct flights.

Direct departures

Ontario to San Francisco

Monday

Air Canada, Emirates, Frontier, +1 more

Air Canada, Emirates, +2 more

Tuesday

Air Canada, Copa Airlines, Emirates, +2 more

Air Canada, Copa Airlines, +3 more

Wednesday

Air Canada, Copa Airlines, Emirates, +2 more

Air Canada, Copa Airlines, +3 more

Thursday

Air Canada, Copa Airlines, Emirates, +2 more

Air Canada, Copa Airlines, +3 more

Friday

Air Canada, Emirates, Frontier, +1 more

Air Canada, Emirates, +2 more

Saturday

Air Canada, Emirates, Frontier, +1 more

Air Canada, Emirates, +2 more

Sunday

Air Canada, Copa Airlines, Emirates, +2 more

Air Canada, Copa Airlines, +3 more

See more direct flights

Direct returns

San Francisco to Ontario

Monday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

Tuesday

Air Canada, Copa Airlines, Frontier, +1 more

Air Canada, Copa Airlines, +2 more

Wednesday

Air Canada, Copa Airlines, Frontier, +1 more

Air Canada, Copa Airlines, +2 more

Thursday

Air Canada, Copa Airlines, Frontier, +1 more

Air Canada, Copa Airlines, +2 more

Friday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

Saturday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

Sunday

Air Canada, Copa Airlines, Emirates, +2 more

Air Canada, Copa Airlines, +3 more

See more direct flights
See more direct flights

Book cheap flights from Ontario to San Francisco

One-way flight deals

directAir Canada
1h 25mONT-SFO
directFrontier
1h 28mONT-SFO
directEmirates
1h 40mONT-SFO
directCopa Airlines
1h 23mONT-SFO
directUnited Airlines
1h 25mONT-SFO

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Ontario - San Francisco Flights

Departure:

Ontario (ONT)United States

Destination:

San Francisco (SFO)United States

Cabin classes:

£30

Browse origins:

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  • Ontario

Browse destinations:

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  • San Francisco