Bolton Field
Bolton Field ( ICAO: KTZR, FAA LID: TZR) is a public airport located eight miles (13 km) southwest of the central business district of Columbus, a city in Franklin County, Ohio, United States. It is a towered, class D, corporate and general aviation airport operated under the auspices of the Columbus Regional Airport Authority. Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Bolton Field is assigned TZR by the FAA but has no designation from the IATA.

Facilities and aircraft
Bolton Field covers an area of 1,500 acres (607 ha) which contains one asphalt paved runway (4/22) measuring 5,500 x 100 ft (1,676 x 30 m). The airport has fuel services available. Planes can use tiedowns or hangars for parking. For the 12-month period ending July 8, 2003, the airport had 74,511 aircraft operations, an average of 204 per day: 100% general aviation, <1% air taxi and <1% military. There are 105 aircraft based at this airport: 90% single engine, 5% multi-engine, 4% jet aircraft and 1% helicopters.