$40 Find Cheap Flights from Ontario to San Francisco - Compare and Save

These are the earliest and latest flight times available from Ontario to San Francisco:

• Earliest: departs at 6:00 am and lands at 7:33 am
• Latest: departs at 8:31 pm and lands at 10:04 pm.

The flight takes about 1h 33m.

Two cabin classes are available on flights from Ontario to San Francisco:

• Economy Class
• First Class

A nonstop flight from Ontario to San Francisco takes 1h 33m, covering 363 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

Round-trip flights from Ontario to San Francisco range from $133 to $270, with an average of $190 over the past 12 months. Anything below $133 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 28% above the $190 route average. Book 4 weeks before departure for the lowest fares.

On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $188 round-trip, compared to $232 via a layover through Denver Intl (DEN).

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Airbus A320neo family is used most often on this route, operated mainly by Frontier. Other aircraft seen on the route include Boeing 737 MAX 9 variants.

Morning is the busiest departure period on Ontario to San Francisco flights, with 40% of flights leaving in that window. Afternoon departures account for 40%, evening flights for 20%, and night flights for 0%.

JetBlue is the only airline on the Ontario to San Francisco route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from Ontario to San Francisco are currently lower than usual. Average one-way flight prices are about $109, which is 14% below the typical average for this route.

San Francisco Airport (SFO) hosts 5 major car rental companies, with daily rates starting from around $15 for economy cars. Top options include:

• Thrifty
• Europcar
• Dollar
• Hertz
• Fox

Flights from Ontario to San Francisco usually depart from Ontario (ONT) and arrive at San Francisco (SFO).

One-stop flights from Ontario to San Francisco most commonly connect through:

• Las Vegas Harry Reid Intl (LAS) - 75% of one-stop connections
• Phoenix Sky Harbor Intl (PHX) - 17% of one-stop connections
• Denver Intl (DEN) - 8% of one-stop connections

Yes. Flexible dates can save you up to 33% on flights from Ontario to San Francisco. Thursday is the cheapest departure day at $176 round-trip on average, while Sunday is the most expensive at $261, a difference of $85.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

2 airlines operate flights between Ontario and San Francisco. The airlines offering nonstop flights on this route include:

• United Airlines
• Frontier

Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time at 5h 11m, compared with 9h 13m via Las Vegas Harry Reid Intl (LAS) and 18h 28m via Denver Intl (DEN).

Some of the most popular sights in San Francisco are Fisherman's Wharf, Union Square and Moscone Center. These are among the most viewed places in San Francisco on KAYAK.

Among airlines operating Ontario to San Francisco flights:

• Frontier: offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• Frontier: a cabin bag and a checked bag in Economy Class
• United Airlines: a cabin bag and a checked bag in Economy Class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

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.

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.

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.

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.