Passengers should keep the applicable e-ticket number or booking reference available for Hong Kong airport self check-in. The airport identifies either reference as a way to retrieve a flight; the cited guidance does not state that both must be carried. The airport also tells departing passengers to have a boarding pass and travel document ready.
Which reference should remain available?
For airport self check-in, the two named options are:
- E-ticket number: can be entered to retrieve the flight.
- Booking reference: can be entered to retrieve the flight.
The relevant reference is the one available for the passenger’s flight. If both are available, the cited guidance still does not make both a universal requirement.
What else matters during airport transit?
For transfers, the airport distinguishes procedures according to whether the passenger has an onward flight boarding pass. That status determines which transfer procedure applies. It is separate from the e-ticket number or booking reference used for self check-in, so passengers should not treat one as a substitute for the other without checking their travel information.
What each traveller must still confirm
The cited pages do not assign a specific reference to an individual booking, state that both the e-ticket number and booking reference must be carried, or identify which transfer procedure applies to a particular itinerary. Each traveller should check the available flight reference, confirm whether an onward boarding pass is present, and verify the corresponding transfer procedure against the travel documents and current airport guidance. If those details are not clear, the available guidance does not provide enough information to guess.