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):
- 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.
- 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.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- 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.
- 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.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- 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 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.
Facts about Glacier Park International Airport (FCA):
- 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.
- United Express has summer Canadair CRJ-700 nonstops to Chicago, and nonstop to Denver year round on CRJ-200s and CRJ-700s.
- In addition to being known as "Glacier Park International Airport", another name for FCA is "GPI".
- Glacier Park International Airport handled 355,928 passengers last year.
- 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 (FCA) has 2 runways.
- Service to Phoenix, Arizona on US Airways ended in 2007.