Cheap flights from Illinois to Austin from $65

The cheapest month to fly to Austin from Illinois is in December. Flight prices, which tend to average around $59, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in December, then September is your next best option. Flight prices from Illinois to Austin during September average around $79.

The cheapest day to depart on your flight to Austin is on a Saturday when prices can be found for as low as $272. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Austin for around $398.

In the afternoon is the cheapest time of day to fly from Illinois to Austin when you can find flight prices for as low as $250. 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 evening, with an average ticket price of $368. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Chicago O'Hare Intl to Austin Bergstrom for the best Illinois - Austin Bergstrom flight prices

You are more likely to see cheaper flights to Austin from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $292 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from Illinois for as low as $224 on momondo.

There are 4 cabin classes available to choose from on Illinois to Austin flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Austin from Illinois according to our data. American Airlines is the first choice among our users, with 42% 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.

As of May 2026, 40 flights take off from Illinois and land in Austin each day. The most common flight departure time for this route is 8:00PM, with 40% of daily flights taking off in the evening.

As of May 2026, 283 flights take off from Illinois and land in Austin each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.