Regardless of the type of airplane you fly, it doesn't hurt to protect yourself from the sun. The most obvious thing you can do is slather on sunscreen on the areas that are exposed. The Mayo Clinic recommends a broad-spectrum sunscreen that blocks out both UVA and UVB rays and has a sun protection factor (SPF) of 15 or greater. Regardless of what sunscreen you decide to use, apply it to all exposed skin. Don't forget any bald areas on top of your head as it is often the most exposed part of your body, unless you are wearing a hat.