What designation is given to a transfer passenger whose connecting flight departs the following day?

The designation for a transfer passenger whose connecting flight departs the following day is accurately identified as a Layover Passenger. This term specifically applies to individuals who have a stopover in a location before their final destination, where their next flight occurs after a significant wait, typically more than 24 hours.

In this context, a Layover Passenger may need to leave the airport or might have a long enough wait that it necessitates an overnight stay. This classification is important for airlines and airports to manage logistics, amenities, and services offered to passengers during their rest period.

The other designations, while related to air travel, apply to different circumstances. For instance, a Transit Passenger is generally someone who is passing through a country without staying overnight, while Transit Without Visa Passenger refers specifically to those who can continue their journey to a final destination without needing a visa for a brief stop, which is different from the longer wait of a Layover Passenger. Thus, the term Layover Passenger is the most fitting for the scenario described.