border of the city and New Milford. From the 1950s to 1970s, the Greater Rockford Airport served as a regional airport, with small airlines offering both turboprop and jet service. To further expand passenger service, the current passenger terminal was constructed in 1987. Competing against easy highway access (and bus service) to O'Hare International Airport, the airport struggled for passenger service during the 1990s, leading to the loss of passenger service from 2001 to 2003. Since 2003, the airport has restored passenger service, primarily marketing its location for leisure travelers. Following the closure of several airlines, the location is served by Allegiant Air as its passenger carrier. Following a 2005 upgrade, the passenger terminal was expanded in size in 2018. During the 2000s, the airport underwent several name changes, adopting the current Chicago Rockford International Airport moniker in 2007. Among the fastest-growing freight airports in the world, full-scale cargo operations began in 1994 as United Parcel Service (UPS) opened an air package hub at the airport next to the terminal. Second only to Worldport in the UPS Airlines operations, the Rockford UPS hub operates on a separate 50-acre ramp (parking up to 40 aircraft at a time), accommodating up to a Boeing 747-8F. Next to the UPS facilities, another cargo ramp was built in 2008, intended to attract additional cargo airlines. In 2016, the facilities were leased by ABX, intending to transfer freight from aircraft to trucks; the operations transitioned into flights for Amazon Air, who partners with ABX, ATI, and Atlas Air. The same year, AAR Corporation opened an FBO facility on the southern end of the airport, building hangars large enough to accommodate an Airbus A380. In 2021, cargo operations were expanded further, as the airport constructed an additional cargo-handling facility and cargo ramp, introducing service by German air cargo company Senator International, contracting 747s by Air Atlanta Icelandic. In 2022, Korean Air Cargo introduced cargo service from Seoul to Rockford on 777-300 freighters, becoming the longest flight from the airport. Rail Passenger For over four decades, the Rockford region has not been served by passenger rail. From 1974 to 1981, Rockford was served by Amtrak via its Black Hawk route, a daily train service from Dubuque, Iowa to Union Station in Chicago with a stop in Rockford. The Black Hawk was discontinued in September 1981 as part of funding cuts to Amtrak. During the 2000s, interest increased