Official Airline Guide (OAG) OAG operates globally in three vertical sectors: Aviation, Cargo and Travel. The Specialties includes: Aviation Data, Travel Planning Tools, Aviation Analysis, Passenger and Cargo Flight Schedules. OAG holds a breadth of aviation, cargo and travel related content and is best known for its airline schedules database. This feeds the world's global distribution systems and travel portals, and drives the internal systems of many airlines air traffic control systems, aircraft manufacturers, airport planners and government agencies. Every ten seconds a flight is updated on OAG system.