Airports 3,951 to 4,000
Hughes Restricted Landing Area Airport
Ottawa Municipal Airport
Westosha Emergency Center Heliport
Illinois Valley Regional Airport Walter A Duncan Field
Hagemeisters Twin Pine Ranch Airport
General Mitchell International Airport
Northwestern Medicine Huntley Hospital Heliport
Ephraim-Gibraltar Airport
Northwestern Medicine McHenry Hospital Heliport
Saint Elizabeth Medical Center-Peru Helistop