Nonstop flight route between Fort Sill, Oklahoma, United States and Dease Lake, British Columbia, Canada:
Departure Airport:

Arrival Airport:

Distance from FSI to YDL:
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- About this route
- FSI Airport Information
- YDL Airport Information
- Facts about FSI
- Facts about YDL
- 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 YDL
- List of Nearest Airports to YDL
- Map of Furthest Airports from YDL
- List of Furthest Airports from YDL
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Dease Lake Airport (YDL), Dease Lake, British Columbia, Canada would travel a Great Circle distance of 2,188 miles (or 3,521 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 Dease Lake 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: | YDL / CYDL |
Airport Name: | Dease Lake Airport |
Location: | Dease Lake, British Columbia, Canada |
GPS Coordinates: | 58°25'19"N by 130°1'53"W |
Operator/Owner: | Stikine Airport Society |
Airport Type: | Public |
Elevation: | 2634 feet (803 meters) |
# of Runways: | 1 |
View all routes: | Routes from YDL |
More Information: | YDL Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- 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.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- Post Field served as a base for flight training for the Air Service.
- 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 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 Dease Lake Airport (YDL):
- Dease Lake Airport (YDL) currently has only 1 runway.
- The closest airport to Dease Lake Airport (YDL) is Telegraph Creek Airport (YTX), which is located 53 miles (85 kilometers) SW of YDL.
- The furthest airport from Dease Lake Airport (YDL) is Port Alfred Airport (AFD), which is located 10,414 miles (16,760 kilometers) away in Port Alfred, South Africa.