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):
- 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.
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- 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.
- 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 Armstrong Airport (YYW):
- Armstrong Airport (YYW) has 2 runways.
- 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.
- The closest airport to Armstrong Airport (YYW) is Geraldton (Greenstone Regional) Airport (YGQ), which is located 94 miles (152 kilometers) ESE of YYW.