Nonstop flight route between Fort Collins/Loveland, Colorado, United States and Fort Sill, Oklahoma, United States:
Departure Airport:

Arrival Airport:

Distance from FNL to FSI:
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- About this route
- FNL Airport Information
- FSI Airport Information
- Facts about FNL
- Facts about FSI
- Map of Nearest Airports to FNL
- List of Nearest Airports to FNL
- Map of Furthest Airports from FNL
- List of Furthest Airports from FNL
- 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 Fort Collins-Loveland Municipal Airport (FNL), Fort Collins/Loveland, Colorado, United States and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 540 miles (or 869 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 Fort Collins-Loveland Municipal 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: | FNL / KFNL |
Airport Name: | Fort Collins-Loveland Municipal Airport |
Location: | Fort Collins/Loveland, Colorado, United States |
GPS Coordinates: | 40°27'6"N by 105°0'41"W |
Area Served: | Fort Collins / Loveland, Colorado |
Operator/Owner: | Fort Collins & Loveland |
Airport Type: | Public |
Elevation: | 5016 feet (1,529 meters) |
# of Runways: | 2 |
View all routes: | Routes from FNL |
More Information: | FNL 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 Fort Collins-Loveland Municipal Airport (FNL):
- As per Federal Aviation Administration records, the airport had 31,094 passenger boardings in calendar year 2008, 31,079 enplanements in 2009, and 35,671 in 2010.
- Because of Fort Collins-Loveland Municipal Airport's high elevation of 5,016 feet, planes must typically fly at a faster airspeed in order to takeoff or land at FNL. Combined with a high temperature, this could make FNL a "Hot & High" airport, where the air density is lower than it would otherwise be at sea level.
- Fort Collins–Loveland Municipal Airport covers an area of 1,065 acres at an elevation of 5,016 feet above mean sea level.
- Fort Collins-Loveland Municipal Airport (FNL) has 2 runways.
- FNL is jointly owned and operated by the two cities of Loveland and Fort Collins.
- The closest airport to Fort Collins-Loveland Municipal Airport (FNL) is Greeley-Weld County Airport (GXY), which is located only 20 miles (32 kilometers) E of FNL.
- The furthest airport from Fort Collins-Loveland Municipal Airport (FNL) is Sir Gaëtan Duval Airport (RRG), which is located 10,850 miles (17,462 kilometers) away in Rodrigues Island, Mauritius.
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.
- The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
- The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- 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.
- 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.