Today only, Frontier is offering one-way fares for as low as $20.15 along certain routes. Valid dates will vary by route, ranging from January 6 through February 11. Be sure to see our Fare Details for specifics. 

For round-trip travel, expect fares to be slightly higher on the return. Still, it's possible to string together some great deals for round-trip tickets.

Purchases must be made by 11:59pm PT, December 31.

Round-trip fares include:

Cleveland to Orlando $85 round-trip

Cleveland to Denver $133 round-trip

Cincinnati to Dallas $80 round-trip

Ft Lauderdale to Washington DC $103 round-trip

Denver to Atlanta $140 round-trip

Denver to Los Angeles $103 round-trip

Washington DC to Miami $103 round-trip

Washington DC to Chicago $83 round-trip

Washington DC to Ft Myers $100 round-trip

Washington DC to West Palm Beach $93 round-trip

Phoenix to Houston $118 round-trip

Phoenix to Salt Lake City $90 round-trip

Chicago to Atlanta $90 round-trip

Chicago Washington DC $73 round-trip

Above image via Shutterstock