Nonstop flight route between Fort Sill, Oklahoma, United States and Niagara Falls, New York, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to IAG:
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- About this route
- FSI Airport Information
- IAG Airport Information
- Facts about FSI
- Facts about IAG
- 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 IAG
- List of Nearest Airports to IAG
- Map of Furthest Airports from IAG
- List of Furthest Airports from IAG
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Niagara Falls International Airport (IAG), Niagara Falls, New York, United States would travel a Great Circle distance of 1,194 miles (or 1,922 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 Niagara Falls 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: | IAG / KIAG |
Airport Name: | Niagara Falls International Airport |
Location: | Niagara Falls, New York, United States |
GPS Coordinates: | 43°6'25"N by 78°56'45"W |
Airport Type: | Public / Military |
Elevation: | 589 feet (180 meters) |
# of Runways: | 3 |
View all routes: | Routes from IAG |
More Information: | IAG Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- 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.
- 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 AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
- 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.
- 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.
- 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 (FSI) currently has only 1 runway.
Facts about Niagara Falls International Airport (IAG):
- Niagara Falls International Airport handled 200,000 passengers last year.
- On September 2, 2009, Niagara Falls International Airport dedicated its new two-story terminal.
- Niagara Falls International Airport (IAG) has 3 runways.
- The closest airport to Niagara Falls International Airport (IAG) is St. Catharines/Niagara District Airport (YCM), which is located only 13 miles (21 kilometers) WNW of IAG.
- The furthest airport from Niagara Falls International Airport (IAG) is Margaret River Airport (MGV), which is located 11,450 miles (18,427 kilometers) away in Margaret River, Western Australia, Australia.
- Civilian aviation operations and jurisdiction of the airport was returned in early 1946, and a joint-use agreement was made with the United States Air Force for Air Force Reserve and New York Air National Guard use of a portion of the airport.
- Today, the Niagara Falls Air Reserve Station is home to the Air Force Reserve Command's 914th Airlift Wing, flying the C-130 Hercules and the New York Air National Guard's 107th Airlift Wing, which shares the 914th AW's C-130 aircraft.
- Because of Niagara Falls International Airport's relatively low elevation of 589 feet, planes can take off or land at Niagara Falls 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.