what is the airport code for rockford, il
Chicago Rockford International Airport. Chicago Rockford International Airport (IATA: RFD, ICAO: KRFD, FAA LID: RFD), is a general aviation and commercial airport in Winnebago County, Illinois. It is 85 miles (136.7 km) northwest of Chicago and four miles (6 km) south of Rockford. The airport served over 100,000 passengers in 2015.