Me and the missus fly a lot when I'm out of cycle .only been hit once when we flow to Mexico, always carry triptan injections on flight with me even when out of cycle just in case . Plus when I came out of military I drove coaches all over Europe and during the winter I would have to take holiday makers to the French, Austrian,Italian and Swiss alps for ski trips .The highest was Val thorens in France which was 7545 feet never got hit whilst up there , but again I only drove those trips if out of cycle