KMDH is the ICAO code for Southern Illinois Airport (IATA MDH), located in Murphysboro, IL.
Southern Illinois Airport (KMDH) is a medium airport in Murphysboro, IL. Pilots and dispatchers reference it by ICAO code KMDH or IATA code MDH. It sits in North America.
Southern Illinois Airport is a regional airport primarily serving general aviation, charter, and corporate flight departments. The 6,506-foot runway means it is well-suited as a dedicated bizjet field, free from airline scheduling pressure.
The longest runway measures 6,506 ft (1,983 m), a midsize and super-midsize-class field. Representative aircraft that operate comfortably here include the Citation Longitude, Challenger 350, and Gulfstream G280. In practice this comfortable for most midsize and super-mid charter equipment.
Southern Illinois Airport sits near sea level at 411 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 164 departing and 54 arriving private-jet legs at KMDH across the next six months of operator inventory. 2 charter operators have run trips through this field in our recent inventory window.
Regional fields like KMDH 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.