"High altitudes are super-drying," says Jillian Dempsey, who advises you spritz skin with a hydrating mist a couple of times during the flight. We love Jurlique's—one whiff of the soothing rose scent and you'll barely notice the turbulence.
Jurlique, Rose Moisture Plus Rosewater Balancing Mist, $22/1.7 fl. oz.; jurlique.com.