Skip to main content
Airport

Southern Illinois Airport

KMDH · MDH

US · US-IL · DOMESTIC AIRPORT

HIGHverified May 2026

Overview

Geography
ARP coordinates
37.7781, -89.2520
Elevation
411 ft (125.27 m)
Timezone
America/Chicago
Operations
Customs
No
Immigration
No
24h operations
No
PPR required
No
Curfew
No
ARFF (ICAO)
—
Status
OPERATIONAL
Identifiers
  • ICAOKMDH
  • IATAMDH
  • GPS_CODEKMDH

Runways (3)

18L/36R1,983 m × 31 m
Geometry
Length1,983 m (6,506 ft)
Width31 m
Runway ends
18L
Threshold37.7905, -89.2479
36R
Threshold37.7727, -89.2484
06/241,269 m × 31 m
Geometry
Length1,269 m (4,163 ft)
Width31 m
Runway ends
06
Threshold37.7755, -89.2588
24
Threshold37.7811, -89.2462
18R/36L1,066 m × 18 m
Geometry
Length1,066 m (3,498 ft)
Width18 m
Runway ends
18R
Threshold37.7797, -89.2585
36L
Threshold37.7701, -89.2587

ATC frequencies

Tower
  • 125.350 MHzCARBONDALE TWR
Ground
  • 121.800 MHzGND
ATIS
  • 119.850 MHzATIS
CTAF
  • 125.350 MHzCTAF