Hi, I would like to know which element is the airline pilot career? Thank you.

In my opinion, an airline pilot has to do with earth element as earth element is related to transportation. And a plan literally is a transport be it transport of passengers and/or cargo.

Thus airlines are typically in the area of "transport". Although, another way of looking is that these transports are mostly "metallic". Thus the career element is earth, but surrounded with "metal".