United Airlines’ Terminal 1 is located at St. Louis Lambert International Airport (STL). Offers self-service kiosks, check-in counters, United Airlines At STL Terminal and TSA PreCheck lanes for a faster security check. Inside are dining options, retail stores, and free Wi-Fi for passengers. For added comfort, the United Club lounge provides complimentary food and beverages to eligible individuals. From check-in to boarding, navigating the neatly laid out terminal is easy. Easy access to ground transportation options from Terminal 1, including shuttles, taxis, and rental cars, makes getting to and from the airport effortless.