Cheap flights from Santa Rosa to Los Angeles from $79

In general, April is the cheapest month to fly from Santa Rosa to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $197. If you aren’t able to travel during the month of April, then book flights to Ontario from Santa Rosa during June instead. Flights to Ontario in June, while not as cheap as those in April, still average around $227.

The cheapest day to depart on your flight to Ontario is on a Monday when prices can be found for as low as $167. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Santa Rosa to Ontario for around $247.

In the evening is the cheapest time of day to fly from Santa Rosa to Ontario when you can find flight prices for as low as $165. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $259 on average. Flights to Ontario from Santa Rosa in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Santa Rosa Sonoma County to Ontario for the best Santa Rosa Sonoma County - Ontario flight prices

You are more likely to see cheaper flights to Ontario from Santa Rosa when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $362 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Santa Rosa for as low as $146 on momondo.

There are 2 cabin classes available to choose from on Santa Rosa to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Alaska Airlines is the most popular carrier operating from Santa Rosa Sonoma County to Ontario

Alaska Airlines, Frontier and Southwest are the top three most popular airlines that fly to Ontario from Santa Rosa according to our data. Alaska Airlines is the first choice among our users, with 27% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 11 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

As of August 2026, 1 flights take off from Santa Rosa and land in Ontario each day. The most common flight departure time for this route is 4:00PM, with 100% of daily flights taking off in the afternoon.

As of August 2026, 7 flights take off from Santa Rosa and land in Ontario each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.