Nonstop flight route between Fort Sill, Oklahoma, United States and Idaho Falls, Idaho, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to IDA:
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- About this route
- FSI Airport Information
- IDA Airport Information
- Facts about FSI
- Facts about IDA
- 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 IDA
- List of Nearest Airports to IDA
- Map of Furthest Airports from IDA
- List of Furthest Airports from IDA
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Idaho Falls Regional Airport (IDA), Idaho Falls, Idaho, United States would travel a Great Circle distance of 953 miles (or 1,534 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 Idaho Falls Regional 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: | IDA / KIDA |
Airport Names: |
|
Location: | Idaho Falls, Idaho, United States |
GPS Coordinates: | 43°30'48"N by 112°4'14"W |
Area Served: | Idaho Falls, Idaho |
Operator/Owner: | City of Idaho Falls |
Airport Type: | Public |
Elevation: | 4744 feet (1,446 meters) |
# of Runways: | 2 |
View all routes: | Routes from IDA |
More Information: | IDA Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- 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.
- 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 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.
- 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.
- 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.
Facts about Idaho Falls Regional Airport (IDA):
- The furthest airport from Idaho Falls Regional Airport (IDA) is Sir Gaëtan Duval Airport (RRG), which is located 10,774 miles (17,339 kilometers) away in Rodrigues Island, Mauritius.
- The closest airport to Idaho Falls Regional Airport (IDA) is Dubois Municipal Airport (DBS), which is located 45 miles (73 kilometers) N of IDA.
- Idaho Falls Regional Airport covers an area of 866 acres at an elevation of 4,744 feet above mean sea level.
- Because of Idaho Falls Regional Airport's high elevation of 4,744 feet, planes must typically fly at a faster airspeed in order to takeoff or land at IDA. Combined with a high temperature, this could make IDA a "Hot & High" airport, where the air density is lower than it would otherwise be at sea level.
- Idaho Falls Regional Airport (IDA) has 2 runways.
- In addition to being known as "Idaho Falls Regional Airport", another name for IDA is "Fanning Field".