Which airport type is characterized by a high percentage of local passengers and turnaround flights?

The correct answer is defined as Origination/Destination (O&D) airports, which are characterized by a high percentage of local passengers and turnaround flights. O&D airports primarily serve passengers who start or end their journey at that airport, rather than transferring through it to connect to other flights. This means that a significant portion of the passenger traffic consists of individuals traveling for local reasons, such as business, tourism, or visiting friends and family.

O&D airports typically see flights that originate from or are destined for their local market, which encourages airlines to offer non-stop or direct services to a variety of destinations. The local passenger base helps sustain these routes, making them integral to the airport's operation and financial viability.

In contrast, other airport types such as hubs are designed to facilitate the transfer of passengers between connecting flights rather than focusing predominantly on local travel. Transfer and through airports emphasize passenger connections, while local passenger traffic and direct flight sequences at hub airports can vary widely. Therefore, the emphasis on high local passenger percentages and flights that originate or terminate at the airport distinguishes O&D airports from other types.