Nonstop flight route between Fort Sill, Oklahoma, United States and St. John's, Newfoundland and Labrador, Canada:
Departure Airport:

Arrival Airport:

Distance from FSI to YYT:
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- About this route
- FSI Airport Information
- YYT Airport Information
- Facts about FSI
- Facts about YYT
- Map of Nearest Airports to FSI
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- Map of Furthest Airports from FSI
- List of Furthest Airports from FSI
- Map of Nearest Airports to YYT
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- List of Furthest Airports from YYT
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and St. John's International Airport (YYT), St. John's, Newfoundland and Labrador, Canada would travel a Great Circle distance of 2,497 miles (or 4,018 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 St. John's International 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: | YYT / CYYT |
Airport Name: | St. John's International Airport |
Location: | St. John's, Newfoundland and Labrador, Canada |
GPS Coordinates: | 47°37'6"N by 52°45'8"W |
Area Served: | St. John's, Newfoundland and Labrador |
Operator/Owner: | Transport Canada |
Airport Type: | Public |
Elevation: | 461 feet (141 meters) |
# of Runways: | 3 |
View all routes: | Routes from YYT |
More Information: | YYT Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- 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 field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- 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 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 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.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- 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 Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
Facts about St. John's International Airport (YYT):
- The airport was designated as one of five Canadian airports suitable as an emergency landing site for the Space Shuttle orbiter.
- Because of St. John's International Airport's relatively low elevation of 461 feet, planes can take off or land at St. John's International 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.
- St. John's International Airport handled 1,318,713 passengers last year.
- St. John's International Airport (YYT) has 3 runways.
- The closest airport to St. John's International Airport (YYT) is Gander International Airport (YQX), which is located 124 miles (199 kilometers) NW of YYT.
- The furthest airport from St. John's International Airport (YYT) is Portland Airport (PTJ), which is located 11,475 miles (18,467 kilometers) away in Portland, Victoria, Australia.
- Although the airfield was not used as much as Argentia, Gander, Stephenville and Goose Bay Airports in the movement of large numbers of aircraft to England, it was still quite busy.
- On April 1, 1946, the airport became a civilian operation under the jurisdiction of the Canadian Department of Transport.