Reference only — not for real-world navigation.
K9D1
Gregory Municipal Airport - Flynn Field · Gregory
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
2,168 ft / 661 m
Transition Altitude
18,000 ft
Primary Channel
FSS 122.10 MHz (HURON RDO)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
13/31 · 3,800 ft · AsphaltLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Gregory Municipal Airport - Flynn Field (K9D1), located in Gregory, 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 2,168 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
Gregory Municipal Airport - Flynn Field
ICAO / IATA
K9D1 / —
Municipality
Gregory
Country
Region
US-SD — South Dakota
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
2,168 ft
Official Website
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 13 / 31
LIGHTED
Runway Length: 3,800 ft / 1,158 m
Runway Width: 60 ft / 18 m
Surface Type: Asphalt
Heading: 134° / 314°
Runway Width: 60 ft / 18 m
Surface Type: Asphalt
Heading: 134° / 314°
RWY 13 (134°)
No ILS / Visual Only
RWY 31 (314°)
No ILS / Visual Only
FSS HURON RDO
122.10 MHz
UNIC CTAF/UNICOM
122.80 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026