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

Arrival Airport:

Distance from YAT to FSI:
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- About this route
- YAT Airport Information
- FSI Airport Information
- Facts about YAT
- Facts about FSI
- Map of Nearest Airports to YAT
- List of Nearest Airports to YAT
- Map of Furthest Airports from YAT
- List of Furthest Airports from YAT
- Map of Nearest Airports to FSI
- List of Nearest Airports to FSI
- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
About this route:
A direct, nonstop flight between Attawapiskat Airport (YAT), Attawapiskat, Ontario, Canada and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 1,486 miles (or 2,391 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 Attawapiskat Airport and Henry Post Army Airfield, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | YAT / CYAT |
Airport Name: | Attawapiskat Airport |
Location: | Attawapiskat, Ontario, Canada |
GPS Coordinates: | 52°55'39"N by 82°25'54"W |
Operator/Owner: | Government of Ontario |
Airport Type: | Public |
Elevation: | 30 feet (9 meters) |
# of Runways: | 1 |
View all routes: | Routes from YAT |
More Information: | YAT Maps & Info |
Arrival 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 |
Facts about Attawapiskat Airport (YAT):
- Because of Attawapiskat Airport's relatively low elevation of 30 feet, planes can take off or land at Attawapiskat 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 Attawapiskat Airport (YAT) is Margaret River Airport (MGV), which is located 10,866 miles (17,487 kilometers) away in Margaret River, Western Australia, Australia.
- Attawapiskat Airport (YAT) currently has only 1 runway.
- The closest airport to Attawapiskat Airport (YAT) is Kashechewan Airport (ZKE), which is located 55 miles (88 kilometers) SE of YAT.
Facts about Henry Post Army Airfield (FSI):
- 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 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 end of World War I, in October 1919 Post Field was deactivated as an active duty airfield in accordance with sharply reduced military budgets, and a small caretaker unit was assigned to the facility for administrative reasons to support the balloon school/company.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- 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.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- 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.