Cheap flights from Austin to Los Angeles from $63

In general, May is the cheapest month to fly from Austin to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $276. If you aren’t able to travel during the month of May, then book flights to Ontario from Austin during October instead. Flights to Ontario in October, while not as cheap as those in May, still average around $298.

The cheapest day to depart on your flight to Ontario is on a Thursday when prices can be found for as low as $389. 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 Austin to Ontario for around $519.

In the morning is the cheapest time of day to fly from Austin to Ontario when you can find flight prices for as low as $388. Flying to Ontario in the morning 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 $509 on average. Flights to Ontario from Austin in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Austin Bergstrom to Ontario for the best Austin Bergstrom - Ontario flight prices

You are more likely to see cheaper flights to Ontario from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $349 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Austin for as low as $238 on momondo.

There is only 1 cabin class available to choose from on Austin to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 20% on your flight if you consider stops on a Austin to Ontario flight.

As of November 2026, prices for Austin to Ontario flights are approximately 11% more expensive when compared to flights at the same time last year.

Frontier is the most popular carrier operating from Austin Bergstrom to Ontario

Southwest, Delta and American Airlines are the top three most popular airlines that fly to Ontario from Austin according to our data. Southwest is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 7 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

Phoenix (PHX) was the most common stop: 70% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $264.

Flights connecting via Las Vegas (LAS) have the shortest average one-way travel time: 4h 55m.

Las Vegas (LAS) has the shortest average layover time for this route: 0h 59m.