AAPA (Association of Asia Pacific Airlines) Association that groups the main airlines of the region Asia Pacific.
AEA (Association of European Airlines) A non-profit association for the European airline industry.
AENA (Aeropuertos Españoles y Navegación Aérea) Public entity that manages Spanish civil airports of general interest and the facilities and networks of air navigation assistance.
Aircraft utilisation Average number of hours that a carrier´s fleet flies on scheduled services per day or per year.
ASK (Available Seat Kilometre) Total number of seats available times the distance flown. Essentially, capacity or supply.
ATK (Available Tonne Kilometre) Payload capacity times distance flown.
Average revenue per ASK It shows the unit revenue of production (Passenger revenue/ASK)
Average Stage Length Kilometres flown per number of departures.
Codesharing A commercial agreement between two airlines that allows an airline to put its two letter IATA identification code on the flights of another airline.
CRS Computer Reservation System or GDS, Global Distribution System. These systems provide schedules, availability, pricing and ticket issuance to travel agents and large corporations for hundreds of airlines, many hotels and car rental operators.
Flown Hours Time from departure of aircraft until its landing.
Freedoms The right of an airline, obtained through bilateral agreements, to operate in the aerospace and on the territory of a country other than its home market.
RPK (Revenue Passenger Kilometre) Total number of revenue paying passengers on aircraft times distance flown in kilometres. In effect, traffic or demand.
RTK (Revenue Tonne Kilometre) Number of tonnes carried times the distance flown.