Discover America Sale from Frontier

Airfarewatchdog.com

Frontier's Discover America sale is valid for travel through February 12, with the lowest fares for Tuesday/Wednesday travel. Tickets require a 14-day advance purchase and must be booked by 11:59pm ET on October 17. Avoid blackout dates: November 22 through December 2, and December 20 through January 5.

Fares include:

Denver to Bismarck $118 round-trip, nonstop, including all taxes

Denver to Houston $117 round-trip, nonstop, including all taxes

Denver to Kansas City $118 round-trip, nonstop, including all taxes

Phoenix to Kansas City $231 round-trip, nonstop, including all taxes

We've also spotted some super low unadvertised deals for travel through November 21. Other carriers may be matching. Fares include:

Los Angeles to Denver $138 round-trip, nonstop, including all taxes

Cincinnati to Denver $138 round-trip, nonstop, including all taxes

Seattle to Denver $138 round-trip, nonstop, including all taxes

Austin to Denver $138 round-trip, nonstop, including all taxes

Washington DC to Denver $198 round-trip, nonstop, including all taxes

Milwaukee to Phoenix $251 round-trip, nonstop, including all taxes

Phoenix to Portland $251 round-trip, nonstop, including all taxes

Frontier image via Shutterstock