"Flight Restrictions: 18 Medical Conditions to Avoid for Summer Travel"

Airlines have the right to prevent passengers from boarding the aircraft if they have medical conditions that could worsen during the flight, according to the World Health Organisation (WHO). Passengers are advised to check their chosen airline's policies on illnesses before booking a flight. The NHS advises against air travel for conditions such as angina, infectious diseases, recent heart attack or stroke, severe respiratory diseases, sickle cell anaemia, and unstable mental health. Other conditions include recent operations or injuries with trapped air or gas, unresolved pneumothorax, increased pressure in the brain, and plaster casts applied within 24-48 hours.