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

Arrival Airport:

Distance from FSI to GCI:
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- About this route
- FSI Airport Information
- GCI Airport Information
- Facts about FSI
- Facts about GCI
- 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 GCI
- List of Nearest Airports to GCI
- Map of Furthest Airports from GCI
- List of Furthest Airports from GCI
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Guernsey Airport (GCI), Guernsey, Channel Islands, United Kingdom would travel a Great Circle distance of 4,684 miles (or 7,539 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 Guernsey Airport, 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 Guernsey Airport. 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: | GCI / EGJB |
Airport Name: | Guernsey Airport |
Location: | Guernsey, Channel Islands, United Kingdom |
GPS Coordinates: | 49°26'4"N by 2°36'6"W |
Area Served: | Guernsey |
Operator/Owner: | States of Guernsey |
Airport Type: | Public |
Elevation: | 336 feet (102 meters) |
# of Runways: | 1 |
View all routes: | Routes from GCI |
More Information: | GCI Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- Fort Sill has embarked on a new plan to support the museum in providing a more dynamic learning experience for the 200,000 military and civilian personnel who visit each year.
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- 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.
- 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.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
Facts about Guernsey Airport (GCI):
- Sufficient progress on these works has taken place to enable Flybe to introduce an Embraer 175 jet on their existing Gatwick service from 31 March 2013.
- In 1960 there were four grass runways, with lengths ranging from 2,040 ft to 3,060 ft.
- Because of Guernsey Airport's relatively low elevation of 336 feet, planes can take off or land at Guernsey 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.
- On 7 December 1997 an F-27 operated by AirUK arriving from Southampton overshot the runway while landing in high cross winds.
- Guernsey Airport (GCI) currently has only 1 runway.
- Guernsey Airport handled 886,396 passengers last year.
- The closest airport to Guernsey Airport (GCI) is Jersey Airport (JER), which is located 24 miles (39 kilometers) SE of GCI.
- The furthest airport from Guernsey Airport (GCI) is Dunedin International Airport (DUD), which is nearly antipodal to Guernsey Airport (meaning Guernsey Airport is almost on the exact opposite side of the Earth from Dunedin International Airport), and is located 12,024 miles (19,350 kilometers) away in Dunedin, Otago, New Zealand.