At 0 percent to 2 percent humidity, cabin air is drier than any desert. Avoid alcohol and coffee because they have a diuretic effect. Also, drink plenty of pure water for several days after landing. Don't eat airline food. High-carbohydrate snacks from home are a better choice.
Airline meals are typically high in fat and preservatives, while low in carbohydrates.
Don't sleep on the plane if it arrives at night. If it lands in the morning, get as much sleep as possible on board. Bring sterile cotton for your ears, an eye mask stating 'Do not disturb,' an inflatable neck pillow, and a sweater or shawl and socks. If the air remains stuffy, ask for an oxygen bottle. Upon arrival, don't rush to a stuffy hotel.