"The airplane cabin is basically a high-altitude desert."Elena Noviello/Getty Images A woman packing her skincare for a flight Two aestheticians tell Travel + Leisure that flying takes a toll on your skin. If you're booking a pre-flight facial, try to schedule it a few days in advance and opt for a hydrating one.What to skip? Avoid aggressive skin treatments before taking a flight.The flight is booked, your bags are packed, and you’re manifestin…