Nonstop flight route between Fort Sill, Oklahoma, United States and Kasabonika First Nation, Ontario, Canada:
Departure Airport:

Arrival Airport:

Distance from FSI to XKS:
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- About this route
- FSI Airport Information
- XKS Airport Information
- Facts about FSI
- Facts about XKS
- 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 XKS
- List of Nearest Airports to XKS
- Map of Furthest Airports from XKS
- List of Furthest Airports from XKS
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Kasabonika Airport (XKS), Kasabonika First Nation, Ontario, Canada would travel a Great Circle distance of 1,388 miles (or 2,234 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 Kasabonika 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: | XKS / CYAQ |
Airport Name: | Kasabonika Airport |
Location: | Kasabonika First Nation, Ontario, Canada |
GPS Coordinates: | 53°31'28"N by 88°38'35"W |
Operator/Owner: | Government of Ontario |
Airport Type: | Public |
Elevation: | 672 feet (205 meters) |
# of Runways: | 1 |
View all routes: | Routes from XKS |
More Information: | XKS 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.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- 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.
Facts about Kasabonika Airport (XKS):
- Kasabonika Airport (XKS) currently has only 1 runway.
- Because of Kasabonika Airport's relatively low elevation of 672 feet, planes can take off or land at Kasabonika 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 closest airport to Kasabonika Airport (XKS) is Big Trout Lake Airport (YTL), which is located 55 miles (89 kilometers) WNW of XKS.
- The furthest airport from Kasabonika Airport (XKS) is Margaret River Airport (MGV), which is located 10,654 miles (17,147 kilometers) away in Margaret River, Western Australia, Australia.