Reference only — not for real-world navigation.
K4I3
Knox County Airport · Mount Vernon
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
1,191 ft / 363 m
Transition Altitude
18,000 ft
Primary Channel
RDO 116.70 MHz (DAYTON RDO)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
10/28 · 5,001 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 Knox County Airport (K4I3), located in Mount Vernon, 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 1,191 ft. Please note that this field primarily supports VFR and visual approach procedures.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
Knox County Airport
ICAO / IATA
K4I3 / —
Municipality
Mount Vernon
Country
Region
US-OH — Ohio
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
1,191 ft
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 10 / 28
LIGHTED
Runway Length: 5,001 ft / 1,524 m
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 97.7° / 277.7°
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 97.7° / 277.7°
RWY 10 (97.7°)
No ILS / Visual Only
RWY 28 (277.7°)
No ILS / Visual Only
A/D COLUMBUS APP/DEP
120.20 MHz
AWOS AWOS 3
118.42 MHz
CLD CLNC DEL
119.45 MHz
RDO DAYTON RDO
116.70 MHz
UNIC CTAF/UNICOM
123.05 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026