Frontier Airlines DEN Terminal +1-888-839-0502 Hello! When you fly on Frontier Airlines DEN Terminal expect a bare-bones experience. Check-in is self-service, so get there early if you require help. Security waits are long, but once past security, it's easy to get through the gates. Few food choices are close to the gates, so get your snack before then. Gate seating is minimal, but the charging areas are convenient. Flights are inexpensive, but plan on additional charges for bags and seat assignment. Overall, it's a utilitarian terminal, but don't plan on luxury. visit us : https://www.terminalsme.com/frontier-airlines/frontier-airlines-den-terminal-denver-international-airport/