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

Arrival Airport:

Distance from YTL to FSI:
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- About this route
- YTL Airport Information
- FSI Airport Information
- Facts about YTL
- Facts about FSI
- Map of Nearest Airports to YTL
- List of Nearest Airports to YTL
- Map of Furthest Airports from YTL
- List of Furthest Airports from YTL
- Map of Nearest Airports to FSI
- List of Nearest Airports to FSI
- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
About this route:
A direct, nonstop flight between Big Trout Lake Airport (YTL), Big Trout Lake, Ontario, Canada and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 1,387 miles (or 2,233 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 Big Trout Lake Airport and Henry Post Army Airfield, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | YTL / CYTL |
Airport Name: | Big Trout Lake Airport |
Location: | Big Trout Lake, Ontario, Canada |
GPS Coordinates: | 53°49'4"N by 89°53'48"W |
Operator/Owner: | Government of Ontario |
Airport Type: | Public |
Elevation: | 730 feet (223 meters) |
# of Runways: | 1 |
View all routes: | Routes from YTL |
More Information: | YTL Maps & Info |
Arrival 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 |
Facts about Big Trout Lake Airport (YTL):
- Because of Big Trout Lake Airport's relatively low elevation of 730 feet, planes can take off or land at Big Trout Lake 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.
- Big Trout Lake Airport (YTL) currently has only 1 runway.
- The closest airport to Big Trout Lake Airport (YTL) is Bearskin Lake Airport (XBE), which is located 47 miles (76 kilometers) WNW of YTL.
- The furthest airport from Big Trout Lake Airport (YTL) is Margaret River Airport (MGV), which is located 10,602 miles (17,062 kilometers) away in Margaret River, Western Australia, Australia.
Facts about Henry Post Army Airfield (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.
- 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.
- 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 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 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.