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Spirit Airlines DEN Terminal is based out of Denver International Airport's Concourse A (DEN). In addition to self-service kiosks, passengers can check in at Spirit's counters on Level 5 close to the west side of the Main Terminal. Once through security, passengers can take the Automated People Mover or walk across the pedestrian bridge to Concourse A. Spirit travelers can easily get ready for their flights with the range of dining options, retail stores, and charging stations available in Concourse A. Spirit advises getting there early to give yourself enough time for security checks, baggage drop-off, and check-in.