Easy Flying With Southwest Airlines STL Terminal +1-888-839-0502 Just flew to Denver from STL and wasn’t sure what terminal is southwest at stl? Quick search told me it’s Terminal 2—thank goodness I looked it up! Terminal 2 is actually pretty nice: not huge, but organized and chill. Security went fast, and I even had time to grab a coffee before boarding. Definitely recommend checking terminal info ahead if you’re flying Southwest—it can really make your airport experience smoother. For more info : https://www.terminalfind.com/southwest-airlines/southwest-airlines-stl-terminal-st-louis-lambert-international-airport/