Henry Post Army Air Field (KFSI)
Medium airport · Fort Sill, Oklahoma, United States
Airport data
| Name | Henry Post Army Air Field |
|---|---|
| ICAO | KFSI |
| IATA | FSI |
| Elevation | 1,189 ft (362 m) above mean sea level |
| Coordinates | N 34°38'59" W 98°24'8" 34.64980, -98.40220 |
| Location | Fort Sill, Oklahoma, United States |
| Scheduled service | No |
Runways
| Runway | Length | Width | Surface | Lighted |
|---|---|---|---|---|
| 18/36 | 5,002 ft (1525 m) | 150 ft | CON | Yes |
Henry Post Army Air Field at a glance
Henry Post Army Air Field is a medium airport in Fort Sill, Oklahoma, United States, known to airline systems as FSI. The field elevation of 1,189 ft (362 m) is the number every arriving pilot dials against QNH — circuit heights and initial approach altitudes at KFSI are all figured from it. There is no scheduled airline service listed here — typical traffic is general aviation, training and local operations.
The single runway, 18/36, offers 5,002 ft (1525 m) of con surface, with runway lighting for night operations. Runway numbers give magnetic orientation: runway 18 points roughly 180° magnetic.
For the weather side of planning, the live METAR and TAF page for KFSI shows the current observation decoded line by line — wind on an instrument dial, visibility, cloud layers and the resulting flight rules — refreshed continuously from official sources.
Nearest airports to Henry Post Army Air Field
Distances are great-circle, measured from the field reference point — planning distances along airways or roads will run longer.
| Airport | Code | Distance |
|---|---|---|
| Lawton Fort Sill Regional Airport | KLAW | 9 km (5 NM) |
| Hobart Regional Airport | KHBR | 70 km (38 NM) |
| Wichita Falls Municipal Airport / Sheppard Air Force Base | KSPS | 74 km (40 NM) |
| Altus Air Force Base | KLTS | 79 km (43 NM) |
| OKC Will Rogers World Airport | KOKC | 110 km (59 NM) |
Flight-planning notes for Henry Post Army Air Field
Density altitude is the quiet performance-killer at any field: on a hot day the 1,189 ft field elevation of Henry Post Army Air Field can translate into a substantially higher density altitude, stretching take-off rolls and flattening climb rates — run the numbers rather than trusting the feel of a standard day. Expect published instrument procedures, controlled airspace and clearance requirements; slots and handling may apply to general aviation traffic.
This entry is one of 917 airports and airfields we list for United States — the country index on the airports hub links the rest. Coordinates above are given in both DMS and decimal degrees so they can go straight into a GPS, a flight planner or a chart plot without conversion.
Where this data comes from
The reference layer behind this page builds on the OurAirports dataset — a public-domain, community-maintained register of the world's airports that many flight planners and apps rely on — with equity records preserved from documented historical listings where the dataset is silent. Figures are carried as published: elevations as surveyed, coordinates as filed, runway dimensions as recorded. Nothing is estimated to fill a gap, and the whole layer regenerates from source on every site build, so corrections upstream arrive here automatically.
Frequently asked questions about Henry Post Army Air Field
What is the ICAO code of Henry Post Army Air Field?
The ICAO identifier of Henry Post Army Air Field is KFSI, and its IATA code is FSI. The ICAO code is the one used in flight plans, METAR reports and aeronautical charts.
How high is Henry Post Army Air Field above sea level?
Henry Post Army Air Field sits at an elevation of 1,189 feet (362 metres) above mean sea level. Field elevation is the reference for pattern altitudes and for setting the altimeter on the ground.
Where exactly is Henry Post Army Air Field located?
The airport lies at 34.6498, -98.4022 — in Fort Sill, Oklahoma, United States, in the northern hemisphere. The closest listed field is Lawton Fort Sill Regional Airport, about 9 km away.
Does KFSI publish METAR weather reports?
Where the station reports, the current METAR and TAF for KFSI appear on its live weather page on this site, refreshed continuously from the US NWS Aviation Weather Center feed.
How long is the runway at Henry Post Army Air Field?
Henry Post Army Air Field has one runway. The longest, 18/36, measures 5,002 ft (1525 m) with a CON surface.