Nonstop flight route between Fort Sill, Oklahoma, United States and Grand Marais, Minnesota, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to GRM:
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- About this route
- FSI Airport Information
- GRM Airport Information
- Facts about FSI
- Facts about GRM
- 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 GRM
- List of Nearest Airports to GRM
- Map of Furthest Airports from GRM
- List of Furthest Airports from GRM
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Grand Marais/Cook County Airport (GRM), Grand Marais, Minnesota, United States would travel a Great Circle distance of 1,001 miles (or 1,610 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 Grand Marais/Cook 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: | GRM / KCKC |
Airport Names: |
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Location: | Grand Marais, Minnesota, United States |
GPS Coordinates: | 47°50'17"N by 90°22'59"W |
Area Served: | Grand Marais, Minnesota |
Operator/Owner: | Cook County |
Airport Type: | Public |
Elevation: | 1799 feet (548 meters) |
# of Runways: | 1 |
View all routes: | Routes from GRM |
More Information: | GRM Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- 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.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- 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 Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- 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.
- 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
Facts about Grand Marais/Cook County Airport (GRM):
- In addition to being known as "Grand Marais/Cook County Airport", another name for GRM is "CKC".
- In the summer of 2009, the airport received $95,000 for the FAA to conduct an environmental impact study on a proposed expansion to the airport.
- Grand Marais/Cook County Airport (GRM) currently has only 1 runway.
- The furthest airport from Grand Marais/Cook County Airport (GRM) is Margaret River Airport (MGV), which is located 10,808 miles (17,393 kilometers) away in Margaret River, Western Australia, Australia.
- The closest airport to Grand Marais/Cook County Airport (GRM) is Thunder Bay International Airport (YQT), which is located 61 miles (99 kilometers) NE of GRM.