Nonstop flight route between Fort Sill, Oklahoma, United States and Eau Claire, Wisconsin, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to EAU:
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- About this route
- FSI Airport Information
- EAU Airport Information
- Facts about FSI
- Facts about EAU
- 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 EAU
- List of Nearest Airports to EAU
- Map of Furthest Airports from EAU
- List of Furthest Airports from EAU
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Chippewa Valley Regional Airport (EAU), Eau Claire, Wisconsin, United States would travel a Great Circle distance of 795 miles (or 1,280 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 Chippewa Valley 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: | EAU / KEAU |
Airport Name: | Chippewa Valley Regional Airport |
Location: | Eau Claire, Wisconsin, United States |
GPS Coordinates: | 44°51'56"N by 91°29'3"W |
Area Served: | Eau Claire, Wisconsin |
Operator/Owner: | Eau Claire County |
Airport Type: | Public |
Elevation: | 913 feet (278 meters) |
# of Runways: | 2 |
View all routes: | Routes from EAU |
More Information: | EAU Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- The Fort Sill Army Radar Approach Control is the Army's Second busiest Air Traffic Control Facility, providing Radar Approach Control service to Henry Post Army Air Field, Lawton/Fort Sill Regional Airport, Duncan/Haliburton Airport and many smaller airports in the area.
- 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.
- 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.
- Air Service/Corps units assigned to Post Field between 1919 and 1941
- Henry Post Army Airfield (FSI) currently has only 1 runway.
Facts about Chippewa Valley Regional Airport (EAU):
- The furthest airport from Chippewa Valley Regional Airport (EAU) is Margaret River Airport (MGV), which is located 10,839 miles (17,444 kilometers) away in Margaret River, Western Australia, Australia.
- Chippewa Valley Regional Airport (EAU) has 2 runways.
- In 1923, 80 acres of land in Putnam Heights were purchased to build an airport.
- Chippewa Valley Regional Airport covers an area of 1,100 acres at an elevation of 913 feet above mean sea level.
- The closest airport to Chippewa Valley Regional Airport (EAU) is Rice Lake Regional Airport (RIE), which is located 41 miles (66 kilometers) NNW of EAU.
- Because of Chippewa Valley Regional Airport's relatively low elevation of 913 feet, planes can take off or land at Chippewa Valley Regional 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.