Chicago Rockford International Airport, is an international airport located in Winnebago County, Illinois. It is located four miles (6 km) south of the city center of Rockford and 85 miles northwest of Chicago. Established in 1946, Chicago-Rockford International Airport is the busiest airport in Northern Illinois (with the exception of Chicago O'Hare and Chicago Midway). In 2016, the airport served nearly 102,000 passengers.Chicago-Rockford was the 29th busiest cargo airport in the United States for 2016, with nearly 923 million pounds of cargo moved through the airport. Since 1994, the airport has served as a major hub for UPS Airlines, which operates two facilities at the airport. In terms of passenger service, the airport offers year-round direct service to five destinations, along with additional destinations offered on a seasonal basis. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a non-hub primary commercial service facility.From 1986 to 1994 and from 2005 to 2015, the airport served as the home of Rockford AirFest (currently on hiatus).HistoryRFD traces its history back to 1917, when Camp Grant was established during World War I as an U.S. Army Cavalry Camp. During the events of World War II, Camp Grant was made into a military training base and prisoner of war confinement center.