$50 Cheap Frontier Airlines flights Phoenix (PHX) to Austin (AUS)

You’ll find cheap round-trip Frontier Airlines flights from $100 from PHX to AUS by organizing your results from “Price (lowest to highest)” on Expedia. Or search for options from $50 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the cheapest months to fly to Austin with Frontier Airlines. You could also find excellent prices on one-way and round-trip tickets in December.

Start searching one to three months ahead of your departure date to get cheaper fares on Frontier Airlines flights from Sky Harbor Intl. Airport (PHX) to Austin-Bergstrom Intl. Airport (AUS). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Select our “Nonstop” filter when browsing for direct Frontier Airlines flights from PHX to AUS. You’ll also be able to compare other airlines offering the same nonstop trip.

Search Frontier Airlines’s earliest flights from PHX to AUS by using our “Early Morning” and “Morning” filters. Not only will you get to your destination sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Austin-Bergstrom Intl. Airport (AUS) is the main Austin hub for Frontier Airlines flights from Sky Harbor Intl. Airport (PHX).

A rewarding loyalty program and the ability to collect points through Frontier Miles are the start of the reasons to fly from PHX to AUS with Frontier Airlines. Plus, by joining Expedia’s free One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to cancel or modify your flight, although additional fees may apply if your booking was made more than 24 hours ago. Need flexible options? Make use of our “Changes included” and “No cancel fee” filters to find flights that won’t charge extra if you have to adjust your plans. To update your booking, visit “Trips,” select your flight and click on “Manage Booking” for more details.