The Qatar Airways DIA Terminal is located in the South Hall of the Jeppesen Terminal at Denver International Airport (DIA). Arrive at least three hours prior to your international flight for a seamless experience. You can check in online up to 24 hours before your trip. Although there isn’t a specific lounge, premium customers can visit partner lounges and check-in booths are clearly marked. Get in touch with Qatar Airways customer support right away if you miss a flight.