Yes, I'd work the pineal reflex point and also work to balance the endocrine system in general. Also head, brain and spine plus digestive system because I find jet lag can make your head and tummy feel woozy, and long haul travel can leave you very achy because of cramped travelling conditions. Suggest to your case study before they travel that they use flight socks and move as much as they can during the flight to minimise risk of DVT. Reflexology is of course an excellent therapy for getting the circulation moving!