Perhaps she has a legitimate phobia about flying. It is totally irrational and uncontrollable and lots of people need psychological treatment to overcome phobias. Just because she wasn't as phobic about it in the past, does not mean it hasn't escalated. For example, my dad used to fly all the time, all over the world, for business. Now he is definitely afraid to fly and gets stressed out about flying for months in advance. (With no particular trigger incident that he has ever talked about). Â I'd just do what everyone else said and not worry about it and enjoy your day without her. You don't want her to be freaking out at the wedding about the return flight. Â However, I'd be pretty hurt if she managed to get on a plane for her honeymoon! Then she is just being selective.