Nonstop flight route between Fort Sill, Oklahoma, United States and Yamagata, Japan:
Departure Airport:

Arrival Airport:

Distance from FSI to SYO:
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- About this route
- FSI Airport Information
- SYO Airport Information
- Facts about FSI
- Facts about SYO
- 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 SYO
- List of Nearest Airports to SYO
- Map of Furthest Airports from SYO
- List of Furthest Airports from SYO
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Shonai Airport (SYO), Yamagata, Japan would travel a Great Circle distance of 6,145 miles (or 9,890 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 Shonai 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 Shonai 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: | SYO / RJSY |
Airport Names: |
|
Location: | Yamagata, Japan |
GPS Coordinates: | 38°48'43"N by 139°47'13"E |
Area Served: | Sakata, Yamagata |
Airport Type: | Public |
Elevation: | 72 feet (22 meters) |
# of Runways: | 1 |
View all routes: | Routes from SYO |
More Information: | SYO 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.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- Post Field served as a base for flight training for the Air Service.
- 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- 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.
Facts about Shonai Airport (SYO):
- The closest airport to Shonai Airport (SYO) is Yamagata Airport (GAJ), which is located 42 miles (67 kilometers) SE of SYO.
- In addition to being known as "Shonai Airport", other names for SYO include "庄内空港" and "Shonai Kūkō".
- The airport opened in 1991 after lobbying efforts by local chambers of commerce, as the area was highly isolated from the major cities of Tokyo and Osaka, requiring half a day of travel to reach either.
- The furthest airport from Shonai Airport (SYO) is Rio Grande Regional Airport (RIG), which is located 11,620 miles (18,701 kilometers) away in Rio Grande, Brazil.
- Shonai Airport (SYO) currently has only 1 runway.
- Because of Shonai Airport's relatively low elevation of 72 feet, planes can take off or land at Shonai 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.