Frontier Airlines offers low-cost flights to destinations in the United States, and Mexico. We are committed to offering our customers the best price for their air travel. Frontier Airlines is a low-cost airline that provides an inexpensive way to fly. It offers flights to many destinations in the United States. Fly with the best airline in the U.S.! Frontier Airlines is committed to delivering the best service and price to you, our customer. We offer a variety of travel options for your needs, from non-stop flights to providing the lowest fares.