Nonstop flight route between Fort Sill, Oklahoma, United States and Estevan, Saskatchewan, Canada:
Departure Airport:

Arrival Airport:

Distance from FSI to YEN:
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- About this route
- FSI Airport Information
- YEN Airport Information
- Facts about FSI
- Facts about YEN
- 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 YEN
- List of Nearest Airports to YEN
- Map of Furthest Airports from YEN
- List of Furthest Airports from YEN
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Estevan Regional Aerodrome (YEN), Estevan, Saskatchewan, Canada would travel a Great Circle distance of 1,033 miles (or 1,662 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 Estevan Regional Aerodrome, 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: | YEN / CYEN |
Airport Name: | Estevan Regional Aerodrome |
Location: | Estevan, Saskatchewan, Canada |
GPS Coordinates: | 49°12'37"N by 102°57'56"W |
Operator/Owner: | City of Estevan |
Airport Type: | Public |
Elevation: | 1904 feet (580 meters) |
# of Runways: | 2 |
View all routes: | Routes from YEN |
More Information: | YEN Maps & Info |
Facts about Henry Post Army Airfield (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.
- 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.
- 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.
- Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- 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.
- 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.
Facts about Estevan Regional Aerodrome (YEN):
- Estevan Regional Aerodrome (YEN) has 2 runways.
- The furthest airport from Estevan Regional Aerodrome (YEN) is Sir Gaëtan Duval Airport (RRG), which is located 10,266 miles (16,521 kilometers) away in Rodrigues Island, Mauritius.
- The closest airport to Estevan Regional Aerodrome (YEN) is Sher-Wood Airport (PWD), which is located 76 miles (123 kilometers) WSW of YEN.