Nonstop flight route between Fort Sill, Oklahoma, United States and Ilorin, Nigeria:
Departure Airport:

Arrival Airport:

Distance from FSI to ILR:
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- About this route
- FSI Airport Information
- ILR Airport Information
- Facts about FSI
- Facts about ILR
- 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 ILR
- List of Nearest Airports to ILR
- Map of Furthest Airports from ILR
- List of Furthest Airports from ILR
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Ilorin International Airport (ILR), Ilorin, Nigeria would travel a Great Circle distance of 6,608 miles (or 10,634 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 large distance between Henry Post Army Airfield and Ilorin International Airport, the route shown on this map most likely appears curved because of this reason.
Try it at home! Get a globe and tightly lay a string between Henry Post Army Airfield and Ilorin International Airport. You'll see that it will travel the same route of the red line on this map!
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: | ILR / DNIL |
Airport Name: | Ilorin International Airport |
Location: | Ilorin, Nigeria |
GPS Coordinates: | 8°26'26"N by 4°29'39"E |
Area Served: | Ilorin, Nigeria |
Airport Type: | Public |
Elevation: | 1126 feet (343 meters) |
# of Runways: | 1 |
View all routes: | Routes from ILR |
More Information: | ILR 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- 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 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 field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- 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 Ilorin International Airport (ILR):
- Ilorin International Airport (ILR) currently has only 1 runway.
- The furthest airport from Ilorin International Airport (ILR) is Wallis Island (WLS), which is nearly antipodal to Ilorin International Airport (meaning Ilorin International Airport is almost on the exact opposite side of the Earth from Wallis Island), and is located 12,100 miles (19,473 kilometers) away in Wallis and Futuna Islands.
- The closest airport to Ilorin International Airport (ILR) is Ibadan Airport (IBA), which is located 82 miles (133 kilometers) SSW of ILR.