Is the pilot of an airplane considered a mahram to his sister traveling with him on the same plane, bearing in mind that they only meet at the departure and arrival airports?

It is narrated in Al-Sahihain and other collections that the Prophet, peace and blessings be upon him, said: "It is not lawful for a woman who believes in Allah and the Last Day to travel a day and a night except with a mahram (definition)."

There is no شرعي (Sharia (definition)-compliant) impediment for the mahram of a traveling woman to be the driver of the vehicle transporting them during the journey, whether it is an airplane or otherwise.