If you’re wondering Which terminal is Delta at STL, the answer is Terminal 1 at St. Louis Lambert International Airport. This terminal provides easy access to boarding gates, security, and check-in for all of Delta Air Lines' flights. For the convenience of travelers, Terminal 1 offers a number of dining options, shops, and free Wi-Fi. Knowing which terminal at STL is Delta helps you... https://airlinesairportterminals.com/delta-airlines/delta-airlines-st-louis-lambert-international-airport-stl-terminal/