AFAIK there isn't a rule against flying. I know a man and his wife who flew down to Mexico to get cancer treatment. I think it's likely there are just more com

AFAIK there isn't a rule against flying. I know a man and his wife who flew down to Mexico to get cancer treatment. I think it's likely there are just more complications with flying, also taking a guess here, but knowing their general lifestyle I would assume they are more comfortable on the ground too.