Concourse at Denver International Airport is the main base of operations for Southwest Airlines (DEN). Passengers can enjoy Southwest Airlines DEN Terminal a range of services in this concourse, such as shops, restaurants, and charging stations. Southwest's check-in counters are situated next to the security checkpoints on the east side of Level 6 of the main terminal building. Passengers use the Automated Guideway Transit System (AGTS)** to access Concourse C after checking in. Southwest operates out of Concourse C, which is a major hub with many of travel options and regular departures throughout the United States.