Frontier Airlines offers select 1-way fares between New York, NY, and Denver, CO, with prices starting at $78.99. (Click on "Frontier Airlines" in the top line to see this price.) That's the lowest price we could find for select routes by $107, although we saw them for $20 less last week. This price is valid on flights departing from New York, NY, (LGA) with arrival in Denver, CO, (DEN) on March 22. Book this travel deal by March 6 for travel on select dates from March 6 through April 30.

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