Which airport type has significant enplaned passengers transferring?

• A. O-D airport
• B. Transfer airport
• C. Through airport
• D. General aviation airport

Answer: (B)

The main idea here is identifying airports whose primary role is to connect travelers from incoming flights to outgoing ones. A transfer airport is built around moving people from one flight to another, so a large portion of its activity involves enplaning passengers who are transferring to continue their journey. This makes enplaned (boarded) passengers a defining feature of transfer airports.

In contrast, an origin-destination airport mainly serves point-to-point travel for arrivals and departures to and from that airport, so transfer traffic is not the focus. A through airport handles traffic that passes through the facility on its way to other destinations, which can include transfers but isn’t defined specifically by the transfer activity. General aviation airports handle private or non-scheduled air traffic, not large-scale commercial transfer activity.