Southern Illinois Airport

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 inventory for KMDH updates continuously as operators publish new empty legs and one-way repositioning trips. Pricing on each leg is available with a free account, and an inventory alert will email you the moment a leg appears on the route you care about.

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.

Southern Illinois Airport is a public airport in Jackson County, Illinois, United States. It is located three nautical miles (6 km) northwest of the central business district of Carbondale and east of Murphysboro. This airport is included in the FAA's National Plan of Integrated Airport Systems for 2025–2029, which categorized it as a regional general aviation facility.