Your journey through Denver International Airport starts at the Jeppesen Terminal, the airport’s primary entrance hub. Frontier Airlines check-in counters are located on the east side of Level 6, clearly marked with signage. You’ll also find a number of self-service kiosks in this area, allowing for a faster check-in process, especially if you've already checked in online and simply n... https://airportsterminalhub.com/airlines/frontier-airlines/frontier-airlines-denver-international-airport-den-terminal/