Gregory Municipal Airport - Flynn Field
9D1 · Gregory, SD · 2,168 ft elevation · var 7E · Non-towered
Airport information
- FAA LID
- 9D1
- Coordinates
- 43.2217, -99.4033
- Elevation
- 2,168 ft MSL
- Magnetic variation
- 7E
- Sectional chart
- OMAHA
- Airport use
- Public
- Control tower
- No
- ARTCC
- MINNEAPOLIS (ZMP)
- Flight service (FSS)
- HURON
- NOTAM facility
- HON
- Attendance
- ALL DAWN-DUSK
- Beacon
- white-green (SS-SR)
- Segmented circle
- No
- Wind indicator
- lighted
- Activated
- 1949/12
- Distance from city
- 1 SE
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:22 AM | 10:22Z |
| Sunrise | 05:58 AM | 10:58Z |
| Sunset | 09:21 PM | 02:21Z |
| Evening civil twilight Loggable night begins | 09:57 PM | 02:57Z |
Plan a flight from 9D1
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- GCO AVBL ON FREQ 121.725 (4 CLICKS TO MINNEAPOLIS CENTER) — Chart Supplement ↗
Runway lighting aids — 13: 2-light PAPI (left) · 31: 2-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 13 · 128°
- Pattern
- left (turns left)
- TPA
- 3,200 ft MSL (≈1,000 AGL)
- CTAF
- 122.8
Enter the left downwind for Rwy 13 at 3,200 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 13/31
3,799 ft × 60 ft · Asphalt (Excellent)- Heading
- 128° mag · 135° true
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (3°)
- Traffic pattern
- Left
- Heading
- 308° mag · 315° true
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (3°)
- Traffic pattern
- Left
- Approach obstacle
- Other, 38 ft, 1,282 ft from threshold, 25 ft R of centerline — 28:1 slope to clear
| Runway | Length | Your margin |
|---|---|---|
| 13/31 | 3,799 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| APT REMARK 2 WITH GCO FREQ | 121.725 | GCO AVBL ON FREQ 121.725 (4 CLICKS TO MINNEAPOLIS CENTER) |
| CTAF | 122.8 | ACTVT MIRL RY 13/31 & PAPI RYS 13 & 31 - CTAF. |
| UNICOM | 122.8 | AUTOMATED UNICOM. |
| PIERRE RCAG | 125.1 | APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC (ZMP) ON FREQ 125.1/269.1 (PIERRE RCAG). |
| PIERRE RCAG | 269.1 | APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC (ZMP) ON FREQ 125.1/269.1 (PIERRE RCAG). |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| ISD · Winner | VOR | 112.80 | r128° / 22.4 NM |
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Fuel available
- 100LL, Jet A
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- MINOR
- Powerplant service
- MINOR
- Parking
- tiedowns
- Other services
- Agricultural, Instruction
Ownership & management
Remarks FAA
- TELEPHONE AVBL.
- GCO AVBL ON FREQ 121.725 (4 CLICKS TO MINNEAPOLIS CENTER)
- FOR CD IF UNA VIA GCO CTC MINNEAPOLIS ARTCC AT 651-463-5588.
- ACTVT MIRL RY 13/31 & PAPI RYS 13 & 31 - CTAF.
- AUTOMATED UNICOM.
- CONC PLANT LOCATED APROPLY 1282 FT OFF END OF RWY 31.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 9D1 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About 9D1
Gregory Municipal Airport - Flynn Field (9D1) is an airport in Gregory, SD, at 2,168 ft MSL. It has 1 runway, the longest 3,799 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 9D1, refreshed from the Aviation Weather Center and FAA NASR.
Does 9D1 have a control tower?
No. Gregory Municipal Airport - Flynn Field is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 9D1?
Gregory Municipal Airport - Flynn Field has 1 runway; the longest is 3,799 ft. See the Runways tab for headings, surface, and lighting.
Where is 9D1?
Gregory Municipal Airport - Flynn Field is in Gregory, SD, at an elevation of 2,168 ft MSL. Coordinates: 43.2217, -99.4033.
Fly out of 9D1 often?
Save 9D1 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.