Nonstop flight route between Fort Sill, Oklahoma, United States and St. Louis, Missouri, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to STL:
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- About this route
- FSI Airport Information
- STL Airport Information
- Facts about FSI
- Facts about STL
- 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 STL
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About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Lambert–St. Louis International Airport (STL), St. Louis, Missouri, United States would travel a Great Circle distance of 527 miles (or 849 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 Lambert–St. Louis 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: | STL / KSTL |
Airport Name: | Lambert–St. Louis International Airport |
Location: | St. Louis, Missouri, United States |
GPS Coordinates: | 38°44'49"N by 90°21'41"W |
Area Served: | Greater St. Louis, Missouri |
Operator/Owner: | City of St. Louis |
Airport Type: | Public |
Elevation: | 605 feet (184 meters) |
# of Runways: | 4 |
View all routes: | Routes from STL |
More Information: | STL Maps & Info |
Facts about Henry Post Army Airfield (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.
- 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.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- Post Field served as a base for flight training for the Air Service.
- 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.
Facts about Lambert–St. Louis International Airport (STL):
- Because of Lambert–St. Louis International Airport's relatively low elevation of 605 feet, planes can take off or land at Lambert–St. Louis 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.
- However, TWA faced increasing problems as overall airline demand softened in response to a softening overall economy.
- Lambert–St. Louis International Airport (STL) has 4 runways.
- Ozark Airlines established its only hub at Lambert in the late 1950s.
- In 1925, the airport became home to Naval Air Station St.
- Named for Albert Bond Lambert, an Olympic medalist and prominent St.
- The furthest airport from Lambert–St. Louis International Airport (STL) is Margaret River Airport (MGV), which is located 10,986 miles (17,681 kilometers) away in Margaret River, Western Australia, Australia.
- In September 2009, American Airlines announced that, as a part of the airline's restructuring, it would eliminate its St.
- The closest airport to Lambert–St. Louis International Airport (STL) is St. Louis Downtown Airport (CPS), which is located only 16 miles (27 kilometers) SE of STL.