Frontier Airlines via DealBase discounts select Frontier Airlines Nationwide 1-Way Fares with fares starting from $19.30. (On the DealBase landing page, click on "Frontier Airlines" in the top line to see this sale; although the landing page offers fares from $39, we found lower prices within.) That's the best price we could find for select routes today by at least $5. This price is valid on flights departing from Albuquerque, NM, (ABQ) with arrival in Denver, CO, (DEN) on April 21. Book this travel deal by March 1 for travel through June 13.

All prices, dates, and booking details were valid at the time of publication.