What is an alternate airport?

An alternate airport refers to a nearby airport that serves as an alternative to the primary airport. This concept is crucial in flight planning and travel logistics, as having an alternate airport can provide options for travelers in the event that the primary airport experiences delays, capacity issues, or unexpected weather conditions. For instance, if a flight is unable to land at its intended destination due to such circumstances, having an alternate airport allows the airline to reroute the flight efficiently, ensuring passenger safety and minimizing disruption.

In contrast, the other choices do not accurately define an alternate airport. The main airport for a specific destination is simply the primary gateway but does not imply an alternative. An airport in a different city is not necessarily considered an alternate unless it specifically serves the same area or destination. Lastly, a private terminal for executive travel represents a different kind of airport service and does not relate to the concept of alternate airports.