Chicago O'Hare International Airport, one of the largest airports in the United States, plays a critical role as a major hub for American Airlines and United Airlines. With eight runways, it is equipped to handle high passenger demand efficiently. The airport's history dates back to 1944 when it was initially a Douglas Aircraft plant before transforming into a large-scale airport post-World War II.
The facility accommodates over 80 million passengers annually and operates nonstop flights to 249 destinations across six continents. Innovations such as split-finger concourses and underground refueling have marked its development over the years. O'Hare has been instrumental in managing air traffic since the early jet age, diverting significant traffic from Midway Airport.
The airport spans 7,600 acres with three air traffic control towers and two cargo areas. A rail station provides connectivity to Chicago's city center. Plans are underway for further expansion by 2030 with new satellite concourses.