Quincy Regional Airport (IATA: UIN, ICAO: KUIN, FAA LID: UIN) (Baldwin Field) is a city-owned airport 12 miles east of Quincy, a city in Adams County, Illinois, United States. It is used for general aviation but also sees Cape Air flights to Chicago's O'Hare International Airport and St. Louis Lambert International Airport, a service which is subsidized by the federal government's Essential Air Service program at a cost of $1,956,856 (per year). The National Plan of Integrated Airport Systems for 2021–2025 categorized it as a non-primary commercial service airport.