Nonstop flight route between Fort Sill, Oklahoma, United States and Falmouth, Massachusetts, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to FMH:
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- About this route
- FSI Airport Information
- FMH Airport Information
- Facts about FSI
- Facts about FMH
- 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 FMH
- List of Nearest Airports to FMH
- Map of Furthest Airports from FMH
- List of Furthest Airports from FMH
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Otis Air National Guard Base Coast Guard Air Station Cape Cod (FMH), Falmouth, Massachusetts, United States would travel a Great Circle distance of 1,582 miles (or 2,546 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 Otis Air National Guard Base Coast Guard Air Station Cape Cod, 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: | FMH / KFMH |
Airport Names: |
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Location: | Falmouth, Massachusetts, United States |
GPS Coordinates: | 41°39'30"N by 70°31'17"W |
View all routes: | Routes from FMH |
More Information: | FMH Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
- In 1940 the Artillery decided that the Air Corps had outgrown such mundane chores as artillery spotting, and it was decided that it would take care of itself with its own observation aircraft.
- With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
- 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 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 first Army aviation at Fort Sill began on 26 July 1915 when eight Curtiss JN-3 airplanes of the 1st Aero Squadron arrived from Rockwell Field, California.
Facts about Otis Air National Guard Base Coast Guard Air Station Cape Cod (FMH):
- The furthest airport from Otis Air National Guard Base Coast Guard Air Station Cape Cod (FMH) is Margaret River Airport (MGV), which is located 11,821 miles (19,024 kilometers) away in Margaret River, Western Australia, Australia.
- In the early 1970s, Otis AFB was marked for closure as part of changing priorities and a nation-wide reduction of military bases in response to cost cutting efforts as the Vietnam War was winding down.
- In addition to being known as "Otis Air National Guard Base Coast Guard Air Station Cape Cod", another name for FMH is "Otis ANGB".
- Otis Air National Guard Base is an Air National Guard installation located within Joint Base Cape Cod, a military training facility, located on the western portion of Cape Cod, in western Barnstable County, Massachusetts, United States.
- In towns near the Air Force's PAVE PAWS radar at Otis Air National Guard Base, there was significant concern about possible adverse effects on health of humans resulting from PAVE PAWS radiation.
- The closest airport to Otis Air National Guard Base Coast Guard Air Station Cape Cod (FMH) is Barnstable Municipal Airport (HYA), which is located only 12 miles (20 kilometers) E of FMH.
- The Air National Guard's and 101st Tactical Fighter Squadron used Otis when the active duty Air Force was present and shared missions with the 33rd Tactical Fighter Wing while operating their own aircraft as indicated in the previous paragraph regarding the Cold War.
- Originally scheduled to be closed by the 2005 BRAC, Otis ANGB was spared in last minute decisions.