Central Airlines was a local service carrier, a scheduled passenger airline operating in Arkansas, Colorado, Kansas, Missouri, Oklahoma, and Texas from 1949 to 1967. It was founded by Keith Kahle in 1944 to operate charter and fixed base services in Oklahoma, but was not granted an air operator's certificate until 1946 and did not begin scheduled flights until September 15, 1949, just before the certificate expired. Central was then headquartered at Meacham Field in Fort Worth, Texas. The airline was eventually acquired by and merged into the original Frontier Airlines which continued and expanded its network.

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.