Originally Posted by
San Gottardo
Unless Air France has rules that are airline-specific for flights to the US, then that shouldn't be a problem. But it's not an FAA issue.
Yes it is the airline and ultimately the captain who decides. In the case of BA it is strictly forbidden while in the air no matter the destination. To the point where the captain could lose his job. But on the ground BA can and often do allow guests in the cockpit. UA is the same. LH and LX are more relaxed about this. I've never asked on AF.