Originally Posted by gmitchs

It was my impression, from back then, that it was up to the entire crew, pilots and FA's, to decide if a family member could fly in the jumpseat.

There may even have been a rule, written or unwritten, but alas, this option was not offered for my NKOTB flight. The only times (maybe 3 total) I ever flew in the cockpit were when my dad was the pilot and the other pilot agreed and the back of the plane was full. I did get booted from the cockpit once when one of the crew spoke up.