Reference only — not for real-world navigation.
KMQS
Chester County G O Carlson Airport · Coatesville
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
660 ft / 201 m
Transition Altitude
18,000 ft
Primary Channel
RDO 113.20 MHz (WILLIAMSPORT RDO)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
11/29 · 5,400 ft · AsphaltLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Chester County G O Carlson Airport (KMQS), located in Coatesville, 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 660 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
Chester County G O Carlson Airport
ICAO / IATA
KMQS / CTH
Municipality
Coatesville
Country
Region
US-PA — Pennsylvania
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
660 ft
Official Website
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 11 / 29
ILS EQUIPPEDLIGHTED
Runway Length: 5,400 ft / 1,646 m
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 101.7° / 281.7°
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 101.7° / 281.7°
RWY 11 (101.7°)
No ILS / Visual Only
RWY 29 (281.7°)
108.50 MHz
IDENT: MQS | CRS: 293°
A/D PHILADELPHIA APP/DEP
124.35 MHz
AWOS AWOS 3
126.25 MHz
CLD CLNC DEL
125.60 MHz
RDO WILLIAMSPORT RDO
113.20 MHz
UNIC CTAF/UNICOM
122.70 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: FAA NASR · Cycle: Jan 2026