£44 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 06:00 and lands at 07:35
• Latest: departs at 20:31 and lands at 22:06.

The flight takes about 1h 35m.

Only Economy class is available on flights from Ontario to San Francisco.

A direct flight from Ontario to San Francisco takes 1h 35m, covering 363 miles.

No, a passport is not required for this domestic route, but you will need another form of identification, such as a driving licence.

Return flights from Ontario to San Francisco range from £105 to £218, with an average of £158 over the past 12 months. Anything below £105 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 27% above the £158 route average. Book 4 weeks before departure for the lowest fares.

On this route, direct flights are cheaper than stopover options on average. Direct fares average £157 return, compared with £174 via a stopover through Denver Intl (DEN).

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £30–£75 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% 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 £57, which is 42% below the typical average for this route.

San Francisco Airport (SFO) hosts 5 major car hire companies, with daily rates starting from around £12 for economy cars. Top options include:

• Europcar
• Thrifty
• 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) – 80% of one-stop connections
• Phoenix Sky Harbor Intl (PHX) – 12% of one-stop connections
• Denver Intl (DEN) – 8% of one-stop connections

Yes. Flexible dates can save you up to 32% on flights from Ontario to San Francisco. Thursday is the cheapest departure day at £142 return on average, while Sunday is the most expensive at £207, a difference of £65.

KAYAK's flexible dates feature shows options up to three 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 direct flights on this route include:

• United Airlines
• Frontier

Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time of 5h 04m, compared to 8h 38m via Las Vegas Harry Reid Intl (LAS) and 18h 28m via Denver Intl (DEN).

Some of the most popular sights in San Francisco are Union Square, Fisherman's Wharf, 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

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