Gregory Municipal / Flynn Field (9D1), South Dakota
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Gregory Municipal / Flynn Field (9D1) is a public-use, non-towered airport in Gregory, South Dakota. It sees light business aviation traffic, served by a single paved runway.
Runways
Gregory Municipal / Flynn Field has one paved runway, 13/31, 3,799 ft long and 60 ft wide, with an asphalt surface.
Source: FAA Form 5010.
Fuel and airfield services
Gregory Municipal / Flynn Field has Jet A and 100LL available on the field. The airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Gregory Municipal / Flynn Field does not clear customs. The nearest port of entry is Joe Foss Field (KFSD), 118 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Gregory Municipal / Flynn Field recorded 346 business aviation movements in 2025. Traffic peaks in October. Business aviation traffic at 9D1 concentrates in the fall, with October and November posting the highest monthly operations of the year.
Business jet movements, FAA TFMSC count. Peak month October, 61 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Gregory Municipal / Flynn Field averages 11.6 days above 90°F in July, 30.4 freeze days in January and 2.7 snow days in February. July is the warmest month, with average highs of 86.6°F, and January the coldest, at 31.6°F.
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Gregory Municipal / Flynn Field has published operating constraints in three categories: access, runway notes and other notes.
A concrete plant is located approximately 1,282 feet off the end of runway 31.
MIRL for runway 13/31 and PAPI for runways 13 and 31 are pilot-activated via CTAF.
Telephone available.
Ground Communication Outlet (GCO) available on frequency 121.725, reached with 4 clicks, to Minneapolis Center.
For clearance delivery, if unable via GCO, contact Minneapolis ARTCC.
Source: FAA Chart Supplement.
Nearby airfields
Gregory Municipal / Flynn Field has five airfields within 47 NM. The closest is Winner Regional (KICR), 21.62 NM northwest.
Part of the Great Plains area.
Source: Skystar calculation from official coordinates.
Skystar at 9D1
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$600.00 catering order at 9D1.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
The $75 minimum applies below $862.50.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What runway is available at 9D1?
Gregory Municipal / Flynn Field (9D1) has one paved runway, 13/31, measuring 3,799 feet long and 60 feet wide with an asphalt surface. Runway lighting (MIRL) and PAPI on both ends are pilot-activated via CTAF.
Is fuel available at Gregory Municipal / Flynn Field?
Gregory Municipal / Flynn Field (9D1) offers both 100LL and Jet A fuel. The field operates on a dawn-to-dusk schedule daily, with no control tower on site.
Is customs clearance available at 9D1?
Gregory Municipal / Flynn Field (9D1) does not have onsite customs. The nearest customs facility is at KFSD, located approximately 118 nautical miles away.