Delta Air Lines operates out of Terminal 1 at Las Vegas Harry Reid International Airport (LAS). Terminal 1 is the main domestic terminal, and Delta's check-in counters and baggage claim areas are located there. Delta typically uses gates within various concourses in Terminal 1, so checking your specific flight details for the precise concourse and gate is advised. The airport also has a tram system connecting different concourses within Terminal 1 to help navigate around the terminal. Additionally, the D gates concourse, part of Terminal 1, features amenities including lounges such as the Centurion Lounge, accessible to some Delta passengers via connections from Terminal 1. In summary, if you are flying Delta in Las Vegas, you will be using Terminal 1 at LAS airport. Make sure to verify your specific gate or concourse for your flight within Terminal 1 when you arrive.