An airline is a company that provides air transport services for passengers and cargo. Airlines operate aircraft, such as airplanes, to fly people and goods from one location to another. They offer various services, including ticket sales, in-flight meals, and entertainment, making travel more comfortable and enjoyable. Airlines can be classified into different categories, such as commercial airlines, which serve the general public, and cargo airlines, which focus on transporting goods. Major airlines often have extensive networks, connecting cities around the world, while smaller regional airlines may serve specific areas. Overall, airlines play a crucial role in global travel and trade.