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

Arrival Airport:

Distance from FSI to YOS:
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- About this route
- FSI Airport Information
- YOS Airport Information
- Facts about FSI
- Facts about YOS
- 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 YOS
- List of Nearest Airports to YOS
- Map of Furthest Airports from YOS
- List of Furthest Airports from YOS
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Owen Sound/Billy Bishop Regional Airport (YOS), Owen Sound, Ontario, Canada would travel a Great Circle distance of 1,156 miles (or 1,860 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 Owen Sound/Billy Bishop Regional 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: | YOS / CYOS |
Airport Names: |
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Location: | Owen Sound, Ontario, Canada |
GPS Coordinates: | 44°35'26"N by 80°50'17"W |
Operator/Owner: | City of Owen Sound |
Airport Type: | Public |
Elevation: | 1008 feet (307 meters) |
# of Runways: | 1 |
View all routes: | Routes from YOS |
More Information: | YOS Maps & Info |
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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- 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.
- 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.
- 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 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.
Facts about Owen Sound/Billy Bishop Regional Airport (YOS):
- The Owen Sound Billy Bishop Regional Airport is operated by a management board of airport users and owned by the City of Owen Sound.
- The airport is classified as an airport of entry by NAV CANADA and is staffed by the Canada Border Services Agency.
- In November 2009, the Toronto City Centre Airport renamed itself after Billy Bishop, creating confusion with this airport.
- The furthest airport from Owen Sound/Billy Bishop Regional Airport (YOS) is Margaret River Airport (MGV), which is located 11,314 miles (18,208 kilometers) away in Margaret River, Western Australia, Australia.
- Owen Sound/Billy Bishop Regional Airport (YOS) currently has only 1 runway.
- The closest airport to Owen Sound/Billy Bishop Regional Airport (YOS) is Wiarton Airport (YVV), which is located only 17 miles (27 kilometers) NW of YOS.
- In addition to being known as "Owen Sound/Billy Bishop Regional Airport", another name for YOS is "Owen Sound (Billy Bishop) Regional Airport".