Cheap flights from San Francisco to Los Angeles from R981

In general, August is the cheapest month to fly from San Francisco to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R2 842. The month of June is another great option to travel to Ontario, with average flight prices from San Francisco averaging around R3 125.

You are more likely to see cheaper flights to Ontario from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around R3 762 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San Francisco for as low as R2 360 on momondo.

Historically, on average around 16% of flights between San Francisco and Ontario have experienced a delay on any given week. The average delay length over the past 12 months has been 110 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 14% of their flights experiencing any sort of delay.

4 flights are operational daily from San Francisco to Ontario as of October 2026. The most popular departure time for this route is 16:00, with 45% of flights per day taking off in the evening.

As of October 2026, 28 flights take off from San Francisco and land in Ontario each week. The most common flight departure day for this route is Thu, with 43% of weekly flights taking off on this day.