FL280 refers to a flight level of 28,000 feet above sea level, commonly used in aviation. Flight levels are standardized altitudes used by pilots and air traffic controllers to ensure safe vertical separation between aircraft. FL280 is often used for cruising altitudes in commercial flights. At FL280, aircraft typically experience lower air resistance and more efficient fuel consumption. This altitude is also above most weather disturbances, providing a smoother flight experience. Pilots must adhere to specific regulations and air traffic control instructions when operating at this flight level to maintain safety in the skies.