Ending today, Frontier Airlines offers select 1-way fares nationwide with prices starting at $34.49. (Click on "Frontier Airlines" in the main paragraph to see this price.) That's the lowest price we could find for select routes by $44. This price is valid on flights departing from Omaha, NE, (OMA) with arrival in Denver, CO, (DEN) on March 23. Book this travel deal today for travel on select dates from March 9 through April 29. Click here to see more routes.