What should a pilot do immediately after realizing they have landed at the wrong airport?

When a pilot realizes they have landed at the wrong airport, the most appropriate immediate action is to contact air traffic control for instructions. This is crucial because notifying air traffic control helps ensure safety and coordination with other flights in the area. They can provide guidance on how to safely navigate the situation, whether it involves departing from the wrong airport or relocating to the correct one.

Beginning to refuel at the incorrect airport without proper authorization can lead to regulatory violations and operational risks. Leaving the airport quickly may also be unsafe and could cause confusion among other aircraft or ground personnel. Filing a report about the incident, while an important step for record-keeping and safety analysis, does not address the immediate safety and operational needs in the moment.

Ultimately, the correct action ensures that the pilot approaches the situation with situational awareness and maintains compliance with aviation regulations.