States References External links has several Ozark timetables from 1952 to 1961, showing where they flew, how often, how long it took and how much it cost. They also have route maps for some later years. Video: "Ozark Air Lines, Computer Reservation System" Airlines disestablished in 1986 Airlines established in 1950 Companies based in St. Louis County, Missouri Defunct companies based in Missouri Defunct regional airlines of the United States Trans World Airlines