A Scheduled Airline Traffic Office (SATO) was an airline ticket office jointly owned by the air carriers and authorized to operate on U.S. military bases and other U.S. Government properties. SATOs are carrier -run offices in government buildings which operate as joint ventures among the airlines. On the other hand, �appointed agencies� were formerly forbidden to compete with SATOs by being prohibited from establishing business locations on U.S. Government properties. However, pursuant to CAB ruling, regular "appointed" agencies were allowed to establish operations on U.S. government property and thus compete directly with SATOs.
SATO was purchased by Peter Ueberoth�s Contrarian Group from the carriers when antitrust questions arose and has since passed into private non-carrier ownership.