Cheap flights from Knoxville to Austin from $45

The cheapest month to fly to Austin from Knoxville is in October. Flight prices, which tend to average around $212, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in October, then December is your next best option. Flight prices from Knoxville to Austin during December average around $212.

The cheapest day to depart on your flight to Austin is on a Tuesday when prices can be found for as low as $112. This is often the case because there is less demand to fly during this day of the week. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Austin for around $441.

At noon is the cheapest time of day to fly from Knoxville to Austin when you can find flight prices for as low as $120. Flying to Austin at noon is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly in the afternoon, with an average ticket price of $155. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Knoxville McGhee Tyson to Austin Bergstrom for the best Knoxville McGhee Tyson - Austin Bergstrom flight prices

You are more likely to see cheaper flights to Austin from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $309 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from Knoxville for as low as $69 on momondo.

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

No. A direct flight is the cheapest option for a flight between Knoxville to Austin.

As of March 2026, prices for Knoxville to Austin flights are approximately 85% more expensive when compared to flights at the same time last year.

Delta and United Airlines are the most popular carriers operating from Knoxville McGhee Tyson to Austin Bergstrom

American Airlines, Delta and Allegiant Air are the top three most popular airlines that fly to Austin from Knoxville according to our data. American Airlines is the first choice among our users, with 51% 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.