1. DRINK PLENTY OF WATER: Cabin air is drier than a desert. Drink water or hot tea and stay away from liquids that will dehydrate you, such as coffee, soda and alcohol. If you are going to indulge, drink extra water to compensate.
2. TAKE VITAMINS OR HERBAL SUPPLEMENTS: These cannot hurt and there are plenty of travellers who swear by large doses of Vitamin C, zinc, lozenges or products such as “Airborne”.
3. GET PLENTY OF REST: Get some sleep before your flight and try to avoid sleeping on the plane if it arrives at your destination during the day or into the evening. This should allow you to sleep at your destination. However, if your flight lands in the morning, try to get some sleep on board so that when you do arrive, you can stay awake until dark and resume a normal sleep cycle.
4. AVOID THE GERMS: Airports and aeroplane cabins are probably the most crowded spaces you will ever find yourself in. Limit contact with your fellow passengers, and flying First Class is the best way to put room between you and a fellow passenger. Other suggestions would be to carry the disinfectant wipes and hand sanitizers that are available, and at the risk of appearing phobic, you could wipe down your tray table, seat belt and armrests when you get seated. If you are really serious, you could wear a face mask or a handkerchief over your nose and mouth to further block the spread of germs from fellow passengers.
Follow these few steps and you might just end up with a healthier tourist or world traveller than your travelling companions.