Spirit Airlines operates out of Denver International Airport (DEN) primarily from Concourse A. Here's some key information about the Denver International Airport, Spirit Airlines Terminal:

Check-In and Baggage:
Location: Check-in counters for Spirit Airlines are located on the east side of the main terminal.
Check-In Options: Self-service kiosks and staffed counters are available for check-in and baggage drop-off.
Baggage Claim: Baggage claim for Spirit Airlines flights is located on the east side of Level 5 in the main terminal.

Security:
TSA Screening: Security checkpoints for Concourse A are located in the main terminal and at the entrance of Concourse A.
PreCheck: TSA PreCheck lanes are available for eligible passengers at the main security checkpoint.

Concourse A Amenities:
Dining & Shopping: Concourse A offers a variety of dining options, including quick service and sit-down restaurants, as well as shops for last-minute travel essentials.
Lounges: Although Spirit Airlines does not have its own lounge, several pay-per-use lounges are available in Concourse A.

Transportation:
Train: A train service connects the main terminal to Concourse A, as well as Concourses B and C.
Ground Transportation: Various ground transportation options, including taxis, rideshares, and shuttles, are available at the airport’s main terminal.

Boarding:
Gates: Spirit Airlines typically uses gates in the lower numbered range of Concourse A. Boarding begins approximately 30 minutes before departure.