Top 5 filthiest areas in an airplane that can make you sick by Carla Sinclair from on 2017-08-07 19:12 (#2YMK4) People are 113 times more likely to catch a cold when they're on an airplane, according to a 2004 study in the Journal of Environmental Health Research. Why? Because the inside of a plane is a cesspool of germs, that's why.(more")