Reference data only — not for flight planning or navigation. Verify with official sources (AIP, NOTAMs, ATC). Full disclaimer
Henry Post Army Air Field (Fort Sill) (KFSI/FSI) — Fort Sill, United States
At a glance
- Tower
- 124.95
- Runways
- 18/36
- Elevation
- 1,189 ft
Times in UTC. Reference only: verify with the AIP and NOTAMs.
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71%
Data Complete
37 of 52 points
Missing: Operations, Fuel, Contacts
Section Breakdown
Basic Info
7/7
Runways
4/4
Frequencies
4/4
Operations
0/2
Fuel
0/1
Contacts
0/2
Additional Info
3/10
Observed Activity
· Oct 26
1 aircraft observed within 6 NM · busiest hour 14:00Z
2026-10-152026-10-26
Distinct ADS-B aircraft seen within 6 NM below 10,000 ft AGL per UTC day · community-feed coverage varies · not official movement totals
Data last updated:
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See a next to a field? Click it to confirm the info is still correct. Recently verified Outdated — please verify
Basic Airport Information
- ICAO: KFSI
- Name: Henry Post Army Air Field (Fort Sill)
- Type: medium_airport
- Category: Military
- Latitude: 34.649799
- Longitude: -98.402199
- Elevation: 1189 ft
- Country: United States
- Municipality: Fort Sill
- IATA Code: FSI
- FAA Code: N/A
- FIR: N/A
- Timezone: America/Chicago
- Distance from City: N/A km
- VFR: Yes
- IFR: No
Runways
Runway 18/36
- Designation: 18/36
- Dimensions: 1525x46m
- Surface: CON
- PCN: 54
- Lighting: Lighted
- NAVAIDs: N/A
- Approach Types: N/A
- Remarks: N/A
Frequencies
- Tower: 124.950 MHz
- Ground: 121.700 MHz
- Operations: 121.500, 124.950, 243.000 MHz
- Traffic/Approach: N/A
- ATIS: 135.425 MHz
Operation Hours
Monday
N/A
Tuesday
N/A
Wednesday
N/A
Thursday
N/A
Friday
N/A
Saturday
N/A
Sunday
N/A
- Extra Hours On Request: Not recorded
- Remarks: N/A
Contacts
- AIS Tel: N/A
- ARO Tel: N/A
- MET Tel: N/A
- Admin Tel: +1 580-442-4643
- Health Tel: N/A
- Police Tel: N/A
- Authorities Tel: N/A
- Website: N/A
- Remarks: N/A
Slots / PPR
- Slot Required: Not recorded
- PPR Required: Not recorded
- PPR Contact: N/A
- Remarks: N/A
Immigration
- Port of Entry: Not recorded
- APIS Required: Not recorded
- GAR Required: Not recorded
- Remarks: N/A
Airport Services
No services listed for this airport yet.
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United States Permit Requirements
Fast
Landing: 1d
- Overflight Permit: No
- Landing Permit: Conditional
- Overflight Lead Time: N/A
- Landing Lead Time: 60 minutes minimum (eAPIS manifest before departure); recommend 24-48 hours for CBP port notification
Private / GA Operations:
No permits required for private non-revenue flights. eAPIS manifest mandatory for all international arrivals/departures.
Active NOTAMs
M0043/
info Upcoming
AIRPORT SURVEILLANCE RADAR/SECONDARY SURVEILLANCE RADAR UNSERVICEABLE
2026-10-31 12:00 UTC
2026-10-31 14:00 UTC
M43/26
info Upcoming
AIRPORT SURVEILLANCE RADAR/SECONDARY SURVEILLANCE RADAR UNSERVICEABLE
2026-10-31 12:00 UTC
2026-10-31 14:00 UTC
10/001
info
OBST TOWER LGT (ASR 1009790) 344757.00N0981740.00W (10.4NM NE FSI) 1625FT (264FT AGL) U/S
2026-10-21 11:18 UTC
2027-01-18 23:59 UTC
+1 more active NOTAM
NOTAMs received from the FAA NOTAM feed (last message 2026-10-28 12:30 UTC). This list is built from the feed as NOTAMs are issued and is not checked against the FAA's full list: confirm with FAA NOTAM Search before flight.
View all NOTAMs on Map
Nearby Airports
Airport History
No milestones recorded for Henry Post Army Air Field (Fort Sill) yet. Know when it opened, who built it or a notable event? Add it with a source.
Add a historical factFrequently Asked Questions
- What is the tower frequency at KFSI?
- The tower frequency at Henry Post Army Air Field (Fort Sill) is 124.95 MHz.
- Does KFSI require landing permits?
- It depends on the flight. No permits required for private non-revenue flights. eAPIS manifest mandatory for all international arrivals/departures. Permit details for United States
- Where is KFSI located?
- Henry Post Army Air Field (Fort Sill) (KFSI) is located in Fort Sill, United States.
- What is the IATA code for KFSI?
- The IATA code for Henry Post Army Air Field (Fort Sill) is FSI.
- How long is the runway at KFSI?
- The main runway at Henry Post Army Air Field (Fort Sill) (18/36) measures 1525x46m.