I love everything about travelling—the journey, the suitcase, and the sense of thrill. But one thing that really leaves me struggling is the condition of my skin after a long flight. The low air pressure and dehydrating air in the plane suck out every ounce of moisture from my skin. However, I recently discovered that what is even more dangerous is its exposure to harmful ultraviolet (UV) rays from the sun. What a lot of people don't know is that these harmful UV rays affect your skin even more when you are up there, at a higher altitude. Therefore, health experts have warned that you should always wear sunscreen while onboard a plane. Moreover, wearing a relevant Sun Protection Factor (SPF) is especially important if you get a window seat rather than an aisle seat. Elizabeth Japal, from The Derma Lab, emphasises that many people do not realise that UV exposure actually increases as we move up in altitude, and aeroplane windows do not block all the UVA rays, which are the primary cause of premature skin ageing. "You’re essentially sitting next to a magnified sun bed, especially in the window seat," she told a leading media house. This, combined with the low humidity of the cabin, makes your skin vulnerable to dehydration, dullness, and damage. "It's not just about how you look stepping off the plane—regular exposure to this kind of environment can really take a toll on skin health over time." The experts have encouraged people to prep their skin before travelling, whether you are flying short or long-haul. And yes, you still need to wear SPF even if it's cloudy and grey.Urging people to prep before they step foot in the airport, Elizabeth says that this applies to everyone, whether you are flying short or long-haul. And yes, you still need to wear SPF even if it's cloudy and grey.So, What Should We Do? Dr Japal and other dermatologists suggest that you must clean, hyderate and apply a proper sunscreen before catching that flight. Here are 4 steps that you must follow: 1. Cleanse Properly Before FlyingIn her number one rule, Dr Japal urges people to cleanse before flying. “Starting with clean skin is essential. Your face will already be exposed to the drying effects of cabin air—leftover makeup, SPF, or pollution will only clog pores and contribute to inflammation,' she told a leading media website. 2. Hydrate Your SkinBoth before and during the flight, you should spritz some mist on your face for hydration. The recycled air on planes can sap your skin of moisture within minutes. Doing this throughout the flight helps prevent dehydration and delivers an instant glow.3. Hydrating SerumSerums are your skin's drink of water. Layering a serum underneath your moisturiser maximises hydration while boosting antioxidant protection.