Ozark Air Lines was a local service carrier in the United States that operated from 1950 until 1986, when it was purchased by Trans World Airlines (TWA). In 2001, TWA was merged into American Airlines. A smaller regional airline that used the Ozark name operated in 2000–2001. From 1950 until 1986, Ozark's headquarters was located at St. Louis Lambert International Airport.

The Civil Aeronautics Board (CAB) was an agency of the federal government of the United States, formed in 1938 and abolished in 1985, that regulated aviation services and conducted air accident investigations. The agency was headquartered in Washington, D.C.