Nonstop flight route between Fort Sill, Oklahoma, United States and Isortoq, Greenland:
Departure Airport:

Arrival Airport:

Distance from FSI to IOQ:
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- About this route
- FSI Airport Information
- IOQ Airport Information
- Facts about FSI
- Facts about IOQ
- 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 IOQ
- List of Nearest Airports to IOQ
- Map of Furthest Airports from IOQ
- List of Furthest Airports from IOQ
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Isortoq Heliport (IOQ), Isortoq, Greenland would travel a Great Circle distance of 3,200 miles (or 5,149 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 large distance between Henry Post Army Airfield and Isortoq Heliport, the route shown on this map most likely appears curved because of this reason.
Try it at home! Get a globe and tightly lay a string between Henry Post Army Airfield and Isortoq Heliport. You'll see that it will travel the same route of the red line on this map!
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: | IOQ / BGIS |
Airport Name: | Isortoq Heliport |
Location: | Isortoq, Greenland |
GPS Coordinates: | 65°32'29"N by 38°58'23"W |
Area Served: | Isortoq, Greenland |
Operator/Owner: | Mittarfeqarfiit |
Airport Type: | Public |
Elevation: | 92 feet (28 meters) |
View all routes: | Routes from IOQ |
More Information: | IOQ Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- 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.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
Facts about Isortoq Heliport (IOQ):
- Because of Isortoq Heliport's relatively low elevation of 92 feet, planes can take off or land at Isortoq Heliport 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 closest airport to Isortoq Heliport (IOQ) is Tasiilaq Heliport (AGM), which is located 39 miles (63 kilometers) E of IOQ.
- The furthest airport from Isortoq Heliport (IOQ) is Hobart International Airport (HBA), which is located 10,848 miles (17,459 kilometers) away in Hobart, Tasmania, Australia.