Chicago Rockford International Airport (IATA: RFD, ICAO: KRFD, FAA LID: RFD), typically referred to as Rockford International Airport, Chicago Rockford, or by its IATA call letters, RFD, is a commercial airport in Rockford, Illinois, located 68 miles (109 kilometers) northwest of Chicago. Established in 1946, the airport was built on the grounds of the former Camp Grant facility, which served as one of the largest training facilities for the U.S. Army during both World Wars. The Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2023–2027 categorized it as a non-hub primary commercial service facility.

As an alternative location for leisure-oriented travelers, the airport currently receives passenger service through Allegiant Air, which flies to six year-round destinations. The third-busiest Chicago airport in Illinois, the Rockford Airport served 103,000 passengers in 2021.

RFD is among the fastest-growing cargo airports in the world. The Airport specializes in cargo operations; processing over 3.4 billion pounds (1.5 million tonnes) of cargo, the airport is the 14th-busiest cargo airport in the United States. UPS Airlines operates a major hub at the airport. The airport is also served by Amazon Air. In the 2020s, cargo operations underwent further expansions, attracting cargo flights from Germany and China.