Homeopathy and JETLAG
Keep the remedies in the pocket of a garment that you are wearing so they avoid X-rays.
Arnica 30c on departure and then every 3 hours approx in flight, no coffee, no booze. If dizzy like the floor moves when you land, Cocculus 30c.
If wiped out like a hangover Nux vomica 30c.
If you lie down or sit on a soft chair and it feels hard, more Arnica.
If there is time get one of these sleep masks from Amazon for all the travellers: