Nonstop flight route between Fort Sill, Oklahoma, United States and Guaymas, Sonora, Mexico:
Departure Airport:

Arrival Airport:

Distance from FSI to GYM:
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- About this route
- FSI Airport Information
- GYM Airport Information
- Facts about FSI
- Facts about GYM
- 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 GYM
- List of Nearest Airports to GYM
- Map of Furthest Airports from GYM
- List of Furthest Airports from GYM
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and General José María Yáñez International Airport (GYM), Guaymas, Sonora, Mexico would travel a Great Circle distance of 870 miles (or 1,401 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 General José María Yáñez International 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: | GYM / MMGM |
Airport Names: |
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Location: | Guaymas, Sonora, Mexico |
GPS Coordinates: | 27°58'8"N by 110°55'29"W |
Operator/Owner: | Aeropuertos y Servicios Auxiliares |
Airport Type: | Public |
Elevation: | 59 feet (18 meters) |
# of Runways: | 1 |
View all routes: | Routes from GYM |
More Information: | GYM Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- 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.
- With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
- 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.
- 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 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.
- 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.
- 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.
Facts about General José María Yáñez International Airport (GYM):
- In addition to being known as "General José María Yáñez International Airport", another name for GYM is "Aeropuerto Internacional General José María Yáñez".
- Because of General José María Yáñez International Airport's relatively low elevation of 59 feet, planes can take off or land at General José María Yáñez International 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.
- The furthest airport from General José María Yáñez International Airport (GYM) is Sir Gaëtan Duval Airport (RRG), which is located 11,765 miles (18,933 kilometers) away in Rodrigues Island, Mauritius.
- General José María Yáñez International Airport (GYM) currently has only 1 runway.
- The closest airport to General José María Yáñez International Airport (GYM) is Ciudad Obregón International Airport (CEN), which is located 78 miles (125 kilometers) ESE of GYM.