Software Design

Airline Booking: Flights, Seats, and Passes

UML Class Diagrams · made in Skemio

UML class diagram of an airline booking system showing FlightSchedule, FlightInstance, Seat, Reservation, and BoardingPass.

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What it shows

Flight schedules exist independently from physical aircraft deployments.
Seat inventory locks prevent race conditions during high-volume checkouts.
Boarding passes generate only after check-in confirms seat assignments.

The takeaway

Separate scheduled route blueprints from physical aircraft legs and passenger boarding credentials.

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