The airport is located 17 miles (27 km) northwest of the Chicago Loop. The Chicago Airport is one of the busiest airports in the world, in terms of number of passengers.
The Chicago Airport is divided into 4 terminals, called terminals 1, 2, 3 (connected by a corridor) and terminal 5 (separate terminal, to access it from the others you have to leave the security control and use the Airport Transportation). In addition, there are projects to build two or more terminals.
The airport has four large terminals. T1 (Concourses B & C), T2 (Concourses E & F) and T3 (Concourses G, H, K & L) are mainly used for domestic flights. T5 (Concourse M) is used for incoming international flights. Concourse C is a satellite terminal connected to Terminal 1 / Concourse B through a pedestrian tunnel. The "automated passenger transport" ATS / Airport Transit System connects the airport terminals with each other and provides a connection to car parks E, H, G and MMF Multi-Modal Facility (rental cars and car park F).
Chicago's O'Hare International Airport is located approximately 30 kilometers northwest of downtown and has been ranked the best airport in the country by international travelers. It is one of the busiest in the world and has 4 Terminals, including one exclusively international, identified with numbers 1, 2, 3 and 5, the latter being international. Every year, more than 75 million people circulate through it and there are several projects aimed at improving and developing various areas.
Each of the Terminals operates with various companies that leave for a wide variety of destinations, with an excellent and complete infrastructure. Inside T1 you will find the airlines United Airlines, United Express Airlines and Lufthansa and it is the place where the characteristic underground tunnel for its music and lights is located and which connects areas B and C, while T2 houses companies such as Continental, Sun Country, Air Canada, ATA, Air Jamaica, US Airways, United and United Express/Great Lakes, America West and Northwest.
Terminal 3 concentrates companies such as Reno Air, Singapore, American Eagle, Transmeridian and American, while the International Terminal is occupied by the companies Transmeridian, China Eastern, Air Canada, Air Ukraine, Sun Country, Royal Jordanian, Japan Airlines, Air France, LOT Polish, Mexicana, British Airways, KLM Royal Dutch, among many others. The various terminals are connected to each other by the ATS train network, which also connects with the different car parks and the metro station.