- To present it to the airport security staff entering the airport or some certain airport areas;
- During passport control or customs clearance as a proof that you have a return ticket or a connecting flight;
- If your flight was delayed or canceled, you may have the airline put a corresponding seal on your itinerary receipt for confirmation purposes;
- To confirm you booked flight in case of registration system failure when airline staff has to manually check in passengers.
That is why we urge you to have a print-out of your itinerary receipt at all times during your travel to avoid any complications.