About the information which is available about the Chicago Rockford International Airport is that it is located in Illinois, Winnebago County, four miles, 6 km, south of Rockford, and 85 miles northwest of Chicago. This airport's codes are IATA: RFD, ICAO: KFRD, FAA LID: RFD. The postal address is 2 Airport Cir, Rockford, IL 61109, United States.