What is a Passenger Service System?

A passenger service system is the core of an airline’s IT infrastructure. This is the system responsible for managing customer interactions with airlines, from booking a ticket to boarding the flight.

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The core components of a passenger service system are:

• Central reservation system
• Airline inventory system
• Departure control system

The passenger service system allows an airline to sell their inventory (seats) and contains information on schedules and fares as well as a database of reservations (or passenger name records) and of the issued tickets.

The main function of the airline inventory system is to define how many seats are available on a particular airline by opening or closing an individual booking class in accordance with rules defined by the airline.

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Airline booking system

The departure control system is the system used by airlines and airports to check in a passenger. The departure control system is connected to the reservation system, enabling it to check who has a valid reservation on a flight.