Nonstop flight route between Kirkwall, Orkney Islands, United Kingdom and Fort Sill, Oklahoma, United States:
Departure Airport:

Arrival Airport:

Distance from KOI to FSI:
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- About this route
- KOI Airport Information
- FSI Airport Information
- Facts about KOI
- Facts about FSI
- Map of Nearest Airports to KOI
- List of Nearest Airports to KOI
- Map of Furthest Airports from KOI
- List of Furthest Airports from KOI
- Map of Nearest Airports to FSI
- List of Nearest Airports to FSI
- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
About this route:
A direct, nonstop flight between Kirkwall Airport (KOI), Kirkwall, Orkney Islands, United Kingdom and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 4,386 miles (or 7,059 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 Kirkwall Airport and Henry Post Army Airfield, 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 Kirkwall Airport and Henry Post Army Airfield. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | KOI / EGPA |
Airport Name: | Kirkwall Airport |
Location: | Kirkwall, Orkney Islands, United Kingdom |
GPS Coordinates: | 58°57'29"N by 2°54'2"W |
Area Served: | Mainland, Orkney |
Operator/Owner: | Highlands and Islands Airports Limited |
Airport Type: | Public |
Elevation: | 58 feet (18 meters) |
# of Runways: | 2 |
View all routes: | Routes from KOI |
More Information: | KOI Maps & Info |
Arrival 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 |
Facts about Kirkwall Airport (KOI):
- The closest airport to Kirkwall Airport (KOI) is Stronsay Airport (SOY), which is located only 16 miles (26 kilometers) NE of KOI.
- Kirkwall Airport handled 145,897 passengers last year.
- Because of Kirkwall Airport's relatively low elevation of 58 feet, planes can take off or land at Kirkwall 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.
- Kirkwall Airport (KOI) has 2 runways.
- The furthest airport from Kirkwall Airport (KOI) is Ryan's Creek Aerodrome (SZS), which is located 11,525 miles (18,548 kilometers) away in Stewart Island, New Zealand.
Facts about Henry Post Army Airfield (FSI):
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- Henry Post Army Airfield was the first home of all Army Aviation Training after World War II before moving to Fort Rucker, Alabama in 1954.
- 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.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- 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.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- 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.
- 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 AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.