Chicago O'Hare International Airport, commonly known as O'Hare, is one of the busiest airports in the United States. Located in Chicago, Illinois, it serves as a major hub for both domestic and international flights. The airport features multiple terminals, each offering various amenities and services for travelers. O'Hare is known for its extensive flight connections, making it a key transit point for many airlines. It has a rich history, originally opening in 1942 as a military facility and later transforming into a commercial airport. Today, it continues to play a vital role in global air travel.