Nonstop flight route between Fort Sill, Oklahoma, United States and Kalispell, Montana, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to FCA:
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- About this route
- FSI Airport Information
- FCA Airport Information
- Facts about FSI
- Facts about FCA
- 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 FCA
- List of Nearest Airports to FCA
- Map of Furthest Airports from FCA
- List of Furthest Airports from FCA
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Glacier Park International Airport (FCA), Kalispell, Montana, United States would travel a Great Circle distance of 1,246 miles (or 2,005 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 Glacier Park 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: | FCA / KGPI |
Airport Names: |
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Location: | Kalispell, Montana, United States |
GPS Coordinates: | 48°18'38"N by 114°15'21"W |
Area Served: | Kalispell, Montana |
Operator/Owner: | Flathead Municipal Airport Authority |
Airport Type: | Public |
Elevation: | 2977 feet (907 meters) |
# of Runways: | 2 |
View all routes: | Routes from FCA |
More Information: | FCA Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- 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.
- 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.
- After returning from combat duty in France, a cadre of the 135th Aero Squadron ) was assigned to Post Field as an observation squadron, supplying aircraft for the United States Army Field Artillery School at Fort Sill and supported Army units at Fort Leavenworth, Kansas.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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 Glacier Park International Airport (FCA):
- In addition to being known as "Glacier Park International Airport", another name for FCA is "GPI".
- The closest airport to Glacier Park International Airport (FCA) is Pincher Creek Airport (WPC), which is located 84 miles (136 kilometers) N of FCA.
- Glacier Park International Airport handled 355,928 passengers last year.
- Service to Phoenix, Arizona on US Airways ended in 2007.
- United Express has summer Canadair CRJ-700 nonstops to Chicago, and nonstop to Denver year round on CRJ-200s and CRJ-700s.
- The furthest airport from Glacier Park International Airport (FCA) is Tôlanaro Airport (FTU), which is located 10,533 miles (16,951 kilometers) away in Tôlanaro, Madagascar.
- Glacier Park International Airport (FCA) has 2 runways.