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

Arrival Airport:

Distance from FSI to YRO:
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- About this route
- FSI Airport Information
- YRO Airport Information
- Facts about FSI
- Facts about YRO
- 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 YRO
- List of Nearest Airports to YRO
- Map of Furthest Airports from YRO
- List of Furthest Airports from YRO
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Ottawa/Rockcliffe Airport (YRO), Ottawa, Ontario, Canada would travel a Great Circle distance of 1,409 miles (or 2,267 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 Ottawa/Rockcliffe 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: | YRO / CYRO |
Airport Name: | Ottawa/Rockcliffe Airport |
Location: | Ottawa, Ontario, Canada |
GPS Coordinates: | 45°27'37"N by 75°38'45"W |
Operator/Owner: | Rockcliffe Flying Club |
Airport Type: | Public |
Elevation: | 188 feet (57 meters) |
# of Runways: | 1 |
View all routes: | Routes from YRO |
More Information: | YRO Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- 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 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 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.
- Henry Post Army Airfield was the first home of all Army Aviation Training after World War II before moving to Fort Rucker, Alabama in 1954.
Facts about Ottawa/Rockcliffe Airport (YRO):
- Because of Ottawa/Rockcliffe Airport's relatively low elevation of 188 feet, planes can take off or land at Ottawa/Rockcliffe 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.
- During the 1970s the airport was also used for scheduled short takeoff and landing commercial flights to the short-lived Victoria STOLport near downtown Montreal.
- The closest airport to Ottawa/Rockcliffe Airport (YRO) is Gatineau-Ottawa Executive Airport (YND), which is located only 6 miles (9 kilometers) NE of YRO.
- Ottawa/Rockcliffe Airport (YRO) currently has only 1 runway.
- The furthest airport from Ottawa/Rockcliffe Airport (YRO) is Margaret River Airport (MGV), which is located 11,458 miles (18,440 kilometers) away in Margaret River, Western Australia, Australia.
- The military left the airport completely in 1994, but their aircraft collection remained to form the nucleus of the Canada Aviation Museum.