Travel Technology Specification
What is PSS?
Passenger Service System
Definition: The mission-critical IT suite that powers an airline's core operational backbone, typically combining the Central Reservation System (CRS), Airline Inventory Management, and Departure Control System (DCS).
Simple Explanation
The central brain of an airline. It decides which seats exist, sets flight schedules, processes bookings, issues tickets, and controls passenger check-in and boarding at the gate.
Technical & Protocol Spec
Leading PSS suites include Amadeus Altéa, SabreSonic, Navitaire New Skies (for low-cost carriers), and IBS Software iFly Res. Migrating a PSS is among the most complex engineering feats in computing, often requiring years of cutover testing.
Production Example in Flight Operations
When Ryanair operates check-in, baggage drop, and seat assignments, all transactions hit their Navitaire PSS in real time.
Key Technical Takeaways
- Core software backbone of any commercial carrier
- Integrates CRS (reservations), Inventory, and DCS (airport check-in)
- Key providers: Amadeus Altéa, SabreSonic, Navitaire, IBS Software