This illustration depicts the same information as in the previous figure, but does so by dividing airline functionality into layers in order to show how each layer implements a particular service or function.
| Departure airport | Intermediate air-traffic control centers | Intermediate air-traffic control centers | Arrival airport | |
|---|---|---|---|---|
| Ticket | Ticket (purchase) | Ticket (complain) | ||
| Baggage | Baggage (check) | Baggage (claim) | ||
| Gate | Gates (load) | Gates (unload) | ||
| Takeoff/Landing | Runway takeoff | Runway landing | ||
| Airplane routing | Airplane routing | Airplane routing | Airplane routing | Airplane routing |