Who holds final authority over the operation of the aircraft when flying solo?

The pilot in command is the individual who holds the final authority over the operation of the aircraft when flying solo. This designation comes with the responsibility for the safety of the flight, making decisions regarding the flight course, and managing all aspects of the aircraft's operation. The pilot in command, particularly in a solo flight situation, assumes ultimate accountability for the aircraft and must possess the necessary knowledge and skills to handle any situation that may arise during the flight.

The roles of others such as a co-pilot, flight instructor, and air traffic control are supportive and advisory in nature. While a co-pilot may assist in operating the aircraft, they do not have the final say; that responsibility lies solely with the pilot in command. A flight instructor provides guidance and instruction but does not have authority once the pilot is flying solo. Air traffic control offers instructions for safe navigation and traffic management but does not assume responsibility for the flight itself. Thus, it is the pilot in command who is ultimately in charge when flying solo.