St. Louis Lambert International Airport is the primary airport serving the Greater St. Louis area. Located about 14 miles northwest of downtown St. Louis, STL is Missouri’s largest and busiest airport, handling over 15 million passengers annually pre-pandemic. The airport serves as a vital gateway to the Midwest, offering flights across the United States and select international destinations.

STL features two terminals: Terminal 1 and Terminal 2. Southwest Airlines operates exclusively from Terminal 1, which is the main terminal at the airport. Terminal 1 has been the heart of STL’s operations for decades, housing most of the airport’s domestic flights and airlines.

Southwest Airlines at STL: A Major Player
Southwest Airlines is the dominant carrier at St. Louis Lambert International Airport, controlling a significant share of the passenger traffic. The airline’s focus city status at STL reflects its commitment to providing a broad network of affordable flights, efficient boarding processes, and friendly customer service.

Market Share and Routes
Southwest serves more destinations from STL than any other airline, offering nonstop flights to over 30 cities across the United States. These routes include popular business and leisure destinations such as Denver, Chicago, Dallas, Las Vegas, Orlando, Phoenix, and Atlanta, among others. Southwest’s competitive pricing and frequent flight schedules make STL an attractive departure and arrival point for both local and connecting travelers.
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