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):
- 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 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 Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- 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.
- Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
- 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.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- 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 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.