The inventory in which a passenger is booked according to the fare purchased. (E.g. a full fare coach class cabin is usually Y class of service)

The official name of one’s reservation in a computer reservation system (CRS).

Issuing multiple tickets for one round-trip journey. This is done to reduce the total cost of the entire reservation.

the percentage of tickets issued through an online booking system compared to the traditional booking channel of agent-assisted reservations.

airfare that requires the traveler to purchase the ticket a minimum number of days prior to departure.

Airline Reporting Corporation- the agency that regulates ticket sales and reports to the airlines for travel agencies.

Administrative Service Charge.  Usually it’s the same as the change fee, or the fee to exchange the ticket for future travel.

The total number of seats allowed to be sold at a particular rate.

Specific dates in which special fares or promotions do not apply. Typically exist around holidays or special events.

An agreement whereby an airline sells large blocks of seats at a discount for resale by a third party.