4MD9
St John Airport
Owings Mills, MarylandElevation 461 ftSmall airport
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Runway detail & declared distances
02/20
RWY 02
Displaced threshold300 ft
RWY 20
Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.
AIRPORT INFORMATION
Facility & services
St John Airport is in Owings Mills, Maryland. Field elevation 461 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.
OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSmall airport
ManagerJONATHAN BEM
Manager phone443-814-0111
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATA4MD9
SectionalWASHINGTON
Center (ARTCC)NEW YORK
Flight service (AFSS)LEESBURG
RegionMaryland
CountryUnited States
Coordinates39.4806, -76.7606
Distance from city4 NM N
SERVICES & LIGHTING
Control towerNon-towered
AIRPORT REMARKS
Operational remarks
›FOR CD CTC POTOMAC APCH AT 866-429-5882
›PRVDD ARPT USED DALGT ONLY AND NO IFR OPERATIONS ARE CONDUCTED; THR TO RY 2 IS DSPLCD 300 FT TO PROVIDE 20:1 APCH OVER PLINE; LARGEST CLASS OF ACFT USING ARPT IS LIMITED TO 12500 LBS GROSS TKOF WGT OR LESS, TWIN ENGINE, AND CTC IS MADE WITH ATCT AT BWI ARPT.
FREQUENTLY ASKED
Does 4MD9 have a METAR?
No on-field METAR is issued for 4MD9. This page uses the nearest reporting station as a reference.
Does 4MD9 have a TAF?
No TAF is issued directly for 4MD9. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 4MD9?
4MD9 sits at 461 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 4MD9?
No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.
This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.