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KFSI

FSI

Henry Post Army Air Field · Fort Sill

Key Facts

Technical summary and operational standards.

ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
1,189 ft / 362 m
Transition Altitude
18,000 ft
Primary Channel
TWR 124.95 MHz (POST TWR)
Runway Summary
17/355,000 ftConcreteLIGHTED

Mission Briefing & Tools

Direct calculators and pre-filled resources for this airport.

TOD CALC
Plan Descent
CROSSWIND
Check Limits
VDP CALC
Visual Point
CONVERTER
QNH / Fuel
SkyVector FlightAware Live METAR Satellite

Less math, more flying. Did this save your approach? 🛬

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Briefing for Henry Post Army Air Field (KFSI), United States. This facility features 1 active runways with an elevation of 1,189 ft. This field primarily supports visual approach procedures.Maintain a Transition Altitude of 18,000 ft for altimeter reset.

Airport Details

Full geographical and organizational metadata.

Full Name
Henry Post Army Air Field
ICAO / IATA
KFSI / FSI
Municipality
Fort Sill
Country
Region
US-OK
GPS Coordinates
Transition Altitude
18,000 ft
Official Website
Wikipedia

Runways & ILS Approach Data

Detailed dimensions and verified landing frequencies.

Runway 17 / 35
LIGHTED
Length: 5,000 ft / 1,524 m
Surface: Concrete
Heading: 179.8° / 359.8°
RWY 17
No ILS
RWY 35
No ILS

Communication Frequencies

ATC and advisory channels.

A/D FORT SILL APP/DEP
118.60 MHz
ATIS ATIS
135.43 MHz
CLD CLNC DEL
121.70 MHz
GND POST GND
121.70 MHz
MISC DUNCAN SCTR
118.60 MHz
PMSV PMSV METRO
37.52 MHz
PTD PTD
123.05 MHz
TWR POST TWR
124.95 MHz

Nearby Airports

Alternatives in the vicinity.

KLAW ILS
Lawton Fort Sill Regional Airport
9 km
KHBR
Hobart Regional Airport
70 km
KSPS ILS
Wichita Falls Municipal Airport / Sheppard Air Force Base
74 km
KLTS ILS
Altus Air Force Base
79 km
KOKC ILS
Will Rogers World Airport
110 km

Data Source: OurAirports · Technical Briefing Jan 2026
ILS Data Source: AIP / FAA NASR Cycle Verified