Chicago O'Hare International is one of the busiest airports in the world, located in Chicago, Illinois. It serves as a major hub for both domestic and international flights, connecting millions of passengers each year. The airport features multiple terminals, offering a wide range of amenities, including shops, restaurants, and lounges. Opened in 1955, O'Hare has undergone several expansions and renovations to accommodate increasing air traffic. It is known for its efficient operations and is a key hub for major airlines like United Airlines and American Airlines. The airport plays a vital role in the global aviation network.