St. Louis Lambert International Airport is the primary commercial airport serving metropolitan St. Louis, Missouri, United States. Commonly referred to as Lambert Field or simply Lambert, it is the largest and busiest airport in the state of Missouri. The airport covers 3,793 acres (1,535 ha) of land. STL is located 14 miles (23 km) northwest of downtown St. Louis in unincorporated St. Louis County between Berkeley and Bridgeton. The airport provides nonstop service to airports throughout the United States and to the Caribbean, Mexico, Canada, and Europe. In 2019, it served nearly 16 million passengers. In 2023 there were more than 270 daily departures to 80 nonstop domestic and international locations.

Bridgeton is a second-ring suburb of Greater St. Louis in northwestern St. Louis County, Missouri, United States. Bridgeton is located at the intersection of the St. Louis outer belt and I-70. Bridgeton serves as the primary transport hub within Greater St. Louis. The population at the 2020 census was 11,445. Portions of St. Louis Lambert International Airport are within Bridgeton. The town is featured in the documentary Atomic Homefront, which covers the effects of radioactive waste stored in the nearby West Lake Landfill site.