Nonstop flight route between Fort Sill, Oklahoma, United States and Armstrong, Thunder Bay District, Ontario, Canada:
Departure Airport:

Arrival Airport:

Distance from FSI to YYW:
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- About this route
- FSI Airport Information
- YYW Airport Information
- Facts about FSI
- Facts about YYW
- 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 YYW
- List of Nearest Airports to YYW
- Map of Furthest Airports from YYW
- List of Furthest Airports from YYW
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Armstrong Airport (YYW), Armstrong, Thunder Bay District, Ontario, Canada would travel a Great Circle distance of 1,182 miles (or 1,902 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 Armstrong 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: | YYW / CYYW |
Airport Name: | Armstrong Airport |
Location: | Armstrong, Thunder Bay District, Ontario, Canada |
GPS Coordinates: | 50°17'25"N by 88°54'34"W |
Operator/Owner: | Government of Ontario |
Airport Type: | Public |
Elevation: | 1058 feet (322 meters) |
# of Runways: | 2 |
View all routes: | Routes from YYW |
More Information: | YYW Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- 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.
- 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.
- Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
- 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.
- 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.
- Post Field served as a base for flight training for the Air Service.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
Facts about Armstrong Airport (YYW):
- The furthest airport from Armstrong Airport (YYW) is Margaret River Airport (MGV), which is located 10,780 miles (17,348 kilometers) away in Margaret River, Western Australia, Australia.
- Armstrong Airport (YYW) has 2 runways.
- The closest airport to Armstrong Airport (YYW) is Geraldton (Greenstone Regional) Airport (YGQ), which is located 94 miles (152 kilometers) ESE of YYW.