What's the most germ-ridden part of an airplane? Research shows that the tray table is the culprit, with nearly eight times as many germs as the next dirtiest surface (say what?!). The best way to escape the pesky tabletop germs is to avoid contact with your food and the tray table on your next flight. Dr. Niket Sonpal, assistant professor at Touro College of Osteopathic Medicine, recommends skipping the flight meals altogether. "The average plane meal is far from healthy, with around 360 to 400 calories per food item (so roughly 1,500 calories total) and high quantities of fat, salt, and sugar."