Commercial airlines are companies that provide air travel services to the public. They operate large passenger aircraft, allowing people to fly between cities and countries. These airlines offer various classes of service, such as economy, business, and first class, catering to different budgets and preferences. Popular airlines like Delta and American Airlines connect millions of travelers every year. In addition to passenger flights, commercial airlines also transport cargo, helping businesses move goods quickly across long distances. They play a crucial role in the global economy by facilitating trade and tourism. With the help of airports and air traffic control, commercial airlines ensure safe and efficient travel for everyone.