Reference only — not for real-world navigation.
KOYM
St Marys Municipal Airport · St Marys
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
1,934 ft / 589 m
Transition Altitude
18,000 ft
Primary Channel
AWOS 118.05 MHz (AWOS 3)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
10/28 · 4,300 ft · AsphaltLIGHTEDFlight Planning
Quick Jump to Next Destination
Tip: Search your next airport to quickly compare ILS data.
Welcome to the technical flight briefing for St Marys Municipal Airport (KOYM), located in St Marys, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 1 active runway with a maximum elevation of 1,934 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
St Marys Municipal Airport
ICAO / IATA
KOYM / STQ
Municipality
St Marys
Country
Region
US-PA — Pennsylvania
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
1,934 ft
Official Website
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 10 / 28
ILS EQUIPPEDLIGHTED
Runway Length: 4,300 ft / 1,311 m
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 90° / 270°
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 90° / 270°
RWY 10 (90°)
No ILS / Visual Only
RWY 28 (270°)
108.90 MHz
IDENT: OYM | CRS: 281°
AWOS AWOS 3
118.05 MHz
CLD ALTOONA RDO CLNC DEL
121.30 MHz
CNTR CLEVELAND CNTR
124.33 MHz
UNIC CTAF/UNICOM
122.70 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: FAA NASR · Cycle: Jan 2026