Although nowadays commercial planes are very safe and comfortable, you can enjoy a healthier travel experience by following a few tips: Changes in pressure. Avoid heavy food and food that causes flatulence the day before you fly. Our on-board menus do not include any ill-advised ingredients. Humidity. The relative humidity in the cabin is lower than in other indoor environments and can cause a certain degree of dehydration. Try to avoid coffee and alcohol the day before you fly and increase your fluid intake during the flight. Space and movement. Space is limited on a plane meaning that movement is also limited. Make sure your hand luggage doesn't impede the movement of your legs and wear comfortable and preferably loose clothing.