Airplane cabins are notorious for being extremely dry, with humidity levels as low as 10-20%, which can strip your skin of its natural moisture. This dehydration can lead to dull, dry, and irritated skin, especially during long flights. Additionally, recycled air can increase exposure to pollutants, making your skin more prone to inflammation and breakouts. To combat the negative effects of airplane air, hydrate your skin before, during, and after your flight. Using a hydrating serum with hyaluronic acid and a rich moisturizer will help replenish lost moisture.