Cheap flights from Ontario to Austin from $91

The cheapest month to fly to Austin from Ontario is in January. Flight prices, which tend to average around $190, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in January, then August is your next best option. Flight prices from Ontario to Austin during August average around $276.

The cheapest day to depart on your flight to Austin is on a Thursday when prices can be found for as low as $354. 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 Ontario to Austin for around $435.

In the afternoon is the cheapest time of day to fly from Ontario to Austin when you can find flight prices for as low as $354. Flying to Austin in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly in the morning, with an average ticket price of $383. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Austin from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $350 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from Ontario for as low as $187 on momondo.

There is only 1 cabin class available to choose from on Ontario to Austin 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 19% on your flight if you consider stops on a Ontario to Austin flight.

As of July 2026, prices for Ontario to Austin flights are approximately 40% cheaper when compared to flights at the same time last year.

Southwest, United Airlines, and Frontier are the most popular carriers operating from Ontario to Austin Bergstrom

Southwest, Delta and American Airlines are the top three most popular airlines that fly to Austin from Ontario 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 Austin. Keep in mind that there are 7 different airlines that fly to Austin on a routine basis, so you have a few additional options to choose from.

Phoenix (PHX) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $193.

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

Dallas (DFW) has the shortest average layover time for this route: 0h 53m.