Frontier Airlines operates from Terminal East at Denver International Airport . Frontier Airlines DEN Terminal offers essential services including check-in counters, baggage claim, and customer assistance. Passengers can also find a selection of dining and shopping options for a more comfortable experience. Designed for efficiency, Terminal East provides a smooth and streamlined process for both arrivals and departures, ensuring convenience for those traveling with Frontier Airlines. It's a key hub for budget-friendly flights across the U.S. and beyond.