With a vast network of both local and international destinations, Frontier Airlines DEN Terminal' main hub at Denver International Airport (DEN) is Concourse A. Passenger amenities at the terminal have recently been enhanced, with new culinary options that accommodate a variety of palates and better seating areas with charging stations. Focusing on fuel-efficient aircraft and providing limited amenities to cut down on waste are two examples of Frontier's environmentally sensitive strategy. Denver is a major entry point for reasonably priced travel since travelers also take advantage of Frontier's regular sales and discounts.