My grandmother was still flying long haul into her 90s. She walked the Great Wall of China on her 90th birthday and 2 years later visited her great great granddaughter in Perth Australia. Feisty until the end.

Now my mother has hit 80 she too has the bug though she's sticking with Europe for now. She's been to Japan once but wants to go again with me.

So, there's no age limit, just will and ability.