If you're traveling through St. with Southwest Airlines STL Terminal. Concourse E is located in Terminal 2, which is the terminal you will use at Louis Lambert International Airport (STL). There is ample seating while you wait for your flight, quick security lines, and simple check-in counters—all of which contribute to a seamless and hassle-free travel experience. There are many different dining and shopping options in Terminal 2, whether you're looking for a quick bite, a last-minute memento, or just a place to unwind. Approximately 14 miles away from St. Louis, it's easy to get to the airport, so make plans appropriately.