Reference only — not for real-world navigation.
KMDH
Southern Illinois Airport · Murphysboro
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
411 ft / 125 m
Transition Altitude
18,000 ft
Primary Channel
TWR 125.35 MHz (CARBONDALE TWR)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
18L/36R · 6,506 ft · AsphaltLIGHTED06/24 · 4,164 ft · AsphaltLIGHTED18R/36L · 3,498 ft · AsphaltLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Southern Illinois Airport (KMDH), located in Murphysboro, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 3 active runways with a maximum elevation of 411 ft. Instrument approaches (IFR) are supported with verified ILS frequencies and identifiers for precision landings.Reference the data below for primary communication channels and detailed runway characteristics. Pilots should observe a Transition Altitude of 18,000 ft verified for this field for altimeter reset procedures.
Full Name
Southern Illinois Airport
ICAO / IATA
KMDH / MDH
Municipality
Murphysboro
Country
Region
US-IL — Illinois
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
411 ft
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 18L / 36R
ILS EQUIPPEDLIGHTED
Runway Length: 6,506 ft / 1,983 m
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 181.2° / 1.2°
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 181.2° / 1.2°
RWY 18L (181.2°)
110.90 MHz
IDENT: MDH | CRS: 182°
RWY 36R (1.2°)
No ILS / Visual Only
Runway 06 / 24
LIGHTED
Runway Length: 4,164 ft / 1,269 m
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 60.6° / 240.6°
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 60.6° / 240.6°
RWY 06 (60.6°)
No ILS / Visual Only
RWY 24 (240.6°)
No ILS / Visual Only
Runway 18R / 36L
LIGHTED
Runway Length: 3,498 ft / 1,066 m
Runway Width: 60 ft / 18 m
Surface Type: Asphalt
Heading: 181.2° / 1.2°
Runway Width: 60 ft / 18 m
Surface Type: Asphalt
Heading: 181.2° / 1.2°
RWY 18R (181.2°)
No ILS / Visual Only
RWY 36L (1.2°)
No ILS / Visual Only
ATIS ATIS
119.85 MHz
CNTR KANSAS CITY CNTR
125.30 MHz
CTAF CTAF
125.35 MHz
GND GND
121.80 MHz
TWR CARBONDALE TWR
125.35 MHz
UNIC UNICOM
122.95 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: FAA NASR · Cycle: Jan 2026