"RFD" . "Northwest Chicagoland International Airport" . "Rockford Airport" . "Chicago\u2013Rockford" . . . . . . "07/25" . . . "Chicago/Rockford, Illinois" . "01/19" . . . . . . "3048.6096" . . . . "Rockford" . . "226.1616" . "Chicago Rockford International Airport" . "2499.36" . . . . "Chicago/Rockford" . . . . "Chicago/Rockford International Airport" . . . "Asphalt/concrete" . "Asphalt" . . "Chicago-Rockford" . . "KRFD" . "RFD" . . "RFD" . "Chicago Rockford International Airport" .