KOSH is the ICAO code for Wittman Regional Airport (IATA OSH), located in Oshkosh, WI.
Wittman Regional Airport (KOSH) is a medium airport in Oshkosh, WI. Pilots and dispatchers reference it by ICAO code KOSH or IATA code OSH. It sits in North America.
Wittman Regional Airport is a regional airport primarily serving general aviation, charter, and corporate flight departments. The 8,002-foot runway means it is well-suited as a dedicated bizjet field, free from airline scheduling pressure.
The longest runway measures 8,002 ft (2,439 m), a heavy-class field. Representative aircraft that operate comfortably here include the Gulfstream G550, Falcon 7X, and Bombardier Global 5500. In practice this most heavy and super-midsize jets operate here without restriction.
Wittman Regional Airport sits near sea level at 808 ft.
Local operations run on America/Chicago. Without scheduled airline traffic, the field tends to be quieter and more flexible for charter and corporate operations — a useful characteristic for early morning, late night, or short-notice flights that would be impractical at a hub.
SkyAccess currently tracks 192 departing and 183 arriving private-jet legs at KOSH across the next six months of operator inventory. 1 aircraft from 5 operators are based here or fly through regularly, so most empty-leg supply originates from a local fleet rather than out-of-town repositioning.
Regional fields like KOSH are a meaningful share of US private aviation — closer to the trip's actual origin or destination than the nearest major hub, with shorter ramp-to-cabin times that are the main reason owners and brokers prefer them.