VISIT US : https://www.terminalfind.com/spirit-airlines/spirit-airlines-den-terminal-denver-international-airport/ Denver International Airport's Concourse A is where Spirit Airlines DEN Terminal is based (DEN). Spirit's counters are situated on Level 5 close to the west side of the Main Terminal, where travelers can check in. Self-service kiosks are also accessible. Those who have cleared security can take the Automated People Mover or walk across the pedestrian bridge to Concourse A. With a range of dining options, retail stores, and charging stations, Concourse A makes it simple for Spirit travelers to get ready for their flights. In order to give yourself enough time for check-in, baggage drop, and security screening, Spirit advises arriving early.