$42 Find Cheap Flights from San Francisco to Ontario - Compare and Save

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

• Earliest: departs at 7:41 am and lands at 9:12 am
• Latest: departs at 10:59 pm and lands at 12:30 am.

The flight takes about 1h 31m.

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

• Economy Class
• Business Class
• First Class

A nonstop flight from San Francisco to Ontario takes 1h 31m, 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 San Francisco to Ontario range from $136 to $280, with an average of $198 over the past 12 months. Anything below $136 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 17% above the $198 route average. Book 5 weeks before departure for the lowest fares.

On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $198 round-trip, compared to $213 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.

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

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

One-way fares from San Francisco to Ontario are currently lower than usual. Average one-way flight prices are about $106, which is 13% below the typical average for this route.

Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:

• Fox
• Thrifty
• Europcar
• Dollar
• Alamo

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

Evening flights have the fewest delays on this route, while night departures tend to have the most.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the San Francisco to Ontario route, 16% of flights were delayed in the past 3 months, with delays averaging 1h 55m.

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

• Phoenix Sky Harbor Intl (PHX) - 45% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) - 40% of one-stop connections
• Denver Intl (DEN) - 10% of one-stop connections
• Salt Lake City (SLC) - 5% of one-stop connections

Yes. Flexible dates can save you up to 25% on flights from San Francisco to Ontario. Monday is the cheapest departure day at $171 round-trip on average, while Sunday is the most expensive at $227, a difference of $56.

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 San Francisco and Ontario. 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 13m, compared with 5h 33m via Salt Lake City (SLC) and 6h 58m via Las Vegas Harry Reid Intl (LAS).

Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Among airlines operating San Francisco to Ontario 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.

ONT follows TSA security screening procedures. More information on the screening process is available in TSA’s security screening procedures. Screening times may change based on TSA operations and seasonal demand.

SFO offers several facilities for travelers with children. Nursery spots are located in Terminals 1, 2 and 3, at the International Terminal A Gates, in the International Terminal Main Hall and at the International Terminal G Gates. Shower facilities are also available at Freshen Up! in the International Terminal Main Hall, pre-security.

Yes, electric vehicle charging stations are available at Domestic Garage Level 1, Long-Term Parking Garage 1 on Levels 2–6 and Long-Term Parking Garage 2 on Levels 1–6. They are also located in International Terminal Garage A on Levels 2 and 7 and International Terminal Garage G on Levels 1, 3 and 7. Spaces are available on a first-come, first-served basis.