Cheap Spirit Airlines flights Austin (AUS) to Denver (DEN)

Use the “Price (lowest to highest)” filter on Expedia to search for cheap Spirit Airlines round-trip flights from AUS to DEN. Affordable one-way fares are available as well.**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.

Browse for round-trip or one-way flights to Denver in January or November. You could find a cheap fare with Spirit Airlines during these off-peak months.

Search for cheap Spirit Airlines flights from Austin-Bergstrom Intl. Airport (AUS) to Denver Intl. Airport (DEN) one to three months prior to your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the best day of the week to book a domestic flight is generally Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

Simply enter your dates, click search and select “Nonstop” on Expedia to find any direct flights from AUS to DEN with Spirit Airlines or another airline.

Browse Spirit Airlines’s earliest flights from AUS to DEN 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.

Denver Intl. Airport (DEN) is the main Denver gateway for Spirit Airlines flights from Austin-Bergstrom Intl. Airport (AUS).

Depart from AUS to DEN with Spirit Airlines and you can look forward to a range of perks starting with a rewarding loyalty program. When booking through Expedia as a Free Spirit and One Key™ member, you could also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee generally applies if you cancel or change your booking more than 24 hours after it has been confirmed. To secure flexible fares, select our “No cancel fee” or “Changes included” filter while looking for flights. For additional information on modifying or canceling your reservation, visit “Trips,” select your flight and click on “Manage Booking.”