A 75-year-old can fly, but there are certain risks, and airplanes should not be used as the preferred means of transportation for the elderly. First of all, there will be rapid changes in air pressure during takeoff and landing, which can easily cause tinnitus, hearing loss and even eardrum perforation. Secondly, the airplane in the high altitude flight in the human body in a state of oxygen deprivation, the elderly are prone to headache, dizziness, panic, shortness of breath, insomnia, loss of appetite, chest tightness, chest pain and other symptoms, and some of the elderly will experience loss of taste. Finally, if the flight time is long, the elderly are also prone to deep vein thrombosis in the lower limbs, which causes swelling of the legs and feet. Therefore, the 75-year-old elderly people must take the plane, should do a good job of disease prevention and control measures, such as wearing ear plugs, regularly get up and move, equipped with oxygen absorption devices and so on.