Nonstop flight route between Fort Sill, Oklahoma, United States and Ludington, Michigan, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to LDM:
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- About this route
- FSI Airport Information
- LDM Airport Information
- Facts about FSI
- Facts about LDM
- Map of Nearest Airports to FSI
- List of Nearest Airports to FSI
- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
- Map of Nearest Airports to LDM
- List of Nearest Airports to LDM
- Map of Furthest Airports from LDM
- List of Furthest Airports from LDM
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Mason County Airport (LDM), Ludington, Michigan, United States would travel a Great Circle distance of 907 miles (or 1,459 kilometers).
A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the relatively short distance between Henry Post Army Airfield and Mason County Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | FSI / KFSI |
Airport Name: | Henry Post Army Airfield |
Location: | Fort Sill, Oklahoma, United States |
GPS Coordinates: | 34°38'58"N by 98°24'7"W |
Operator/Owner: | U.S. Army ATCA-ASO |
Airport Type: | Military |
Elevation: | 1189 feet (362 meters) |
# of Runways: | 1 |
View all routes: | Routes from FSI |
More Information: | FSI Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | LDM / KLDM |
Airport Name: | Mason County Airport |
Location: | Ludington, Michigan, United States |
GPS Coordinates: | 43°57'44"N by 86°24'28"W |
Area Served: | Ludington |
Operator/Owner: | Mason County |
Airport Type: | Public |
Elevation: | 646 feet (197 meters) |
# of Runways: | 2 |
View all routes: | Routes from LDM |
More Information: | LDM Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- The closest airport to Henry Post Army Airfield (FSI) is Lawton–Fort Sill Regional Airport (LAW), which is located only 6 miles (9 kilometers) S of FSI.
- The furthest airport from Henry Post Army Airfield (FSI) is Sir Gaëtan Duval Airport (RRG), which is located 10,920 miles (17,575 kilometers) away in Rodrigues Island, Mauritius.
- The Fort Sill Army Radar Approach Control is the Army's Second busiest Air Traffic Control Facility, providing Radar Approach Control service to Henry Post Army Air Field, Lawton/Fort Sill Regional Airport, Duncan/Haliburton Airport and many smaller airports in the area.
- With the end of World War I, in October 1919 Post Field was deactivated as an active duty airfield in accordance with sharply reduced military budgets, and a small caretaker unit was assigned to the facility for administrative reasons to support the balloon school/company.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- After returning from combat duty in France, a cadre of the 135th Aero Squadron ) was assigned to Post Field as an observation squadron, supplying aircraft for the United States Army Field Artillery School at Fort Sill and supported Army units at Fort Leavenworth, Kansas.
Facts about Mason County Airport (LDM):
- The closest airport to Mason County Airport (LDM) is Manistee County Blacker Airport (MBL), which is located 23 miles (37 kilometers) NNE of LDM.
- Mason County Airport (LDM) has 2 runways.
- Because of Mason County Airport's relatively low elevation of 646 feet, planes can take off or land at Mason County Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
- The furthest airport from Mason County Airport (LDM) is Margaret River Airport (MGV), which is located 11,095 miles (17,856 kilometers) away in Margaret River, Western Australia, Australia.