ATPCO (Airline Tariff Publishing Company) – it maintains a vast fares database for over 500 airlines. Data is updated several times a day and fed into the GDS’s and other travel distribution channels.
OAG (Official Airline Guide) – is a travel data service provider, which publishes electronic data-base daily, and with flight schedules of over 1,000 airlines.
INNOVATA – Innovata is a flight schedules aggregator and data service provider. It works with IATA and maintains a schedules database for about 900 airlines.