Overseas National Airways

Overseas National Airways (ONA) was a supplemental air carrier (also known as an irregular air carrier or a non-scheduled carrier) during the period in which the Civil Aeronautics Board (CAB), a now defunct United States Federal agency, tightly regulated almost all US commercial air transport. From 1964 onward, supplemental carriers were charter carriers, but until 1964 they were charter-scheduled hybrids. Until 1950, ONA was known as Calasia Air Transport, and until 1947, Air Travel.

ONA was effectively two distinct carriers, separated by a two-year interval in 1963–1965 during which it fell into bankruptcy and became almost completely moribund, after which it was reconstituted by new ownership/management. From 1969 through the mid-1970s, ONA was one of the largest charter carriers in the United States, engaged in diverse activities including building the Mississippi Queen paddlewheel riverboat. However, in its last years the carrier faced increasing competition, uncertainty and poor financial results and in 1975–1977 suffered the loss of three aircraft in accidents within a 16-month period, including two DC-10s within two months. The carrier chose to liquidate in 1978 outside bankruptcy.