While traveling the skin can need some extra attention or even different products than you’d normally use at home. A change in climate can mean a change in the way your skin looks as well.
In environments where there’s alot of humidity your skin will probably look great, but since you’re sweating more than normal you also need to be sure and sue a great cleanser at the end of the day.
While flying the skin has a tendency to dry out, so drinking a lot of water and using a moisturizing cream in the air in the best way to go. A natural oil moisturizer is another great option for getting quality hydration without additives.