Do you need to know Which terminal is Delta at STL? St. Louis Lambert International Airport's Terminal 1 is the only location from which Delta Air Lines operates. This station is renowned for its accessible amenities, quick security processing, and well-organized layout. Travelers may swiftly go to their gates, complete TSA screening, and check in with ease at Delta counters. There are also a number of dining and shopping opportunities in Terminal 1. Being aware of the Delta terminal at STL eases travel anxiety and guarantees a timely arrival. For a seamless travel experience if you're traveling Delta, just follow the airport signs to Terminal 1.