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

Arrival Airport:

Distance from FSI to YSH:
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- About this route
- FSI Airport Information
- YSH Airport Information
- Facts about FSI
- Facts about YSH
- 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 YSH
- List of Nearest Airports to YSH
- Map of Furthest Airports from YSH
- List of Furthest Airports from YSH
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Smiths Falls-Montague (Russ Beach) Airport (YSH), Smiths Falls, Ontario, Canada would travel a Great Circle distance of 1,382 miles (or 2,223 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 Smiths Falls-Montague (Russ Beach) 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: | YSH / CYSH |
Airport Name: | Smiths Falls-Montague (Russ Beach) Airport |
Location: | Smiths Falls, Ontario, Canada |
GPS Coordinates: | 44°56'44"N by 75°56'25"W |
Operator/Owner: | Smith Falls Flying Club |
Airport Type: | Public |
Elevation: | 418 feet (127 meters) |
# of Runways: | 1 |
View all routes: | Routes from YSH |
More Information: | YSH 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.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- 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 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 Smiths Falls-Montague (Russ Beach) Airport (YSH):
- The furthest airport from Smiths Falls-Montague (Russ Beach) Airport (YSH) is Margaret River Airport (MGV), which is located 11,476 miles (18,469 kilometers) away in Margaret River, Western Australia, Australia.
- Smiths Falls-Montague (Russ Beach) Airport (YSH) currently has only 1 runway.
- The closest airport to Smiths Falls-Montague (Russ Beach) Airport (YSH) is Brockville Regional Tackaberry Airport (XBR), which is located 23 miles (37 kilometers) SSE of YSH.
- Because of Smiths Falls-Montague (Russ Beach) Airport's relatively low elevation of 418 feet, planes can take off or land at Smiths Falls-Montague (Russ Beach) 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.