There are most likely no direct flights on the Ontario — San Francisco route
Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Ontario to San Francisco. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
A non-stop flight is the most convenient and comfortable way to fly from Ontario to San Francisco, despite the fact that sometimes flights with transfers can cost significantly less.
•
•
•
•
•
•
Answers to questions about the route that travelers are most interested in.
We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
There are most likely no direct flights on the Ontario — San Francisco route
Ontario — Oakland
09/30/2026
Departure
Direct flight
WN690
starting at $104
Ontario — Oakland
10/23/2026
Departure
Direct flight
WN3300
starting at $114
Ontario — San Francisco
07/28/2026
Departure
Direct flight
UA1375
starting at $291
Ontario — San Francisco
07/30/2026
Departure
Direct flight
UA5624
starting at $237
Ontario — San Francisco
07/30/2026
Departure
Direct flight
UA1375
starting at $293
Ontario — San Francisco
08/01/2026
Departure
Direct flight
UA5624
starting at $290
Ontario — San Francisco
10/23/2026
Departure
Direct flight
UA1375
starting at $156
Ontario — San Jose
09/03/2026
Departure
Direct flight
WN2956
starting at $109
The route Ontario — San Francisco is served by several airlines: Southwest Airlines, United Airlines, and Frontier Airlines. This gives passengers more freedom in choosing flights. You can consider not only the price but also schedules, baggage policies, and onboard service. Our service compares all offers so you can find tickets from $29 and choose the most convenient option. Thanks to airline competition, you may also find promotional fares or special offers, helping you save even more. Plan your trip in advance and choose the best flights without overpaying.
The cheapest one-way flight from Ontario to San Francisco departs on 09/03/2026, is operated by Frontier Airlines and costs $29
There is no information about the cheapest roundtrip flight from Ontario to San Francisco
Fastest flight from Ontario to San Francisco takes 1h 10m
There are direct flights on this route 5 days a week: Tu, We, Th, Fr, and Sa
The distance between Ontario and San Francisco is 597km (370 miles). The average flight duration is 1h 29m. There are 7 direct flights from Ontario to San Francisco. Ontario and San Francisco are in the same time zone. Flights from Ontario begin at 6:00 AM. The latest flight from Ontario departs at 6:59 PM
The cheapest flight ticket from Ontario to San Francisco according to data for the last 48 hours costs $29
Often the best time to buy tickets from Ontario to San Francisco is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Ontario to San Francisco can be found flying in these months: August, September, July.
The fastest flights from Ontario to San Francisco start from 1 hour 10 minutes in the air.
The following airlines operate direct flights on the route Ontario — San Francisco: Southwest Airlines, United Airlines
The minimum one-way ticket price from Ontario to San Francisco is $28 (August 2026), while the maximum is $156 (May 2027). On average, a ticket costs $70–$147.
Prices on the Ontario — San Francisco route are unpredictable: costs change from month to month with no clear pattern. Still, even here some periods are more affordable than others.
Despite the fluctuations, patterns exist: the cheapest period is August 2026–September 2026 — averaging $29. The most expensive is December 2026–May 2027 ($126). The difference reaches 77%.
With this kind of price behavior, it's worth comparing prices across several months and booking when a good deal appears. A good benchmark is August 2026–September 2026, where you can save up to 77%.
Price spread on this route is 63.2%. Costs vary significantly, so your choice of month can noticeably affect your travel budget.
