Nonstop flight route between Fort Sill, Oklahoma, United States and Ephrata, Washington, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to EPH:
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- About this route
- FSI Airport Information
- EPH Airport Information
- Facts about FSI
- Facts about EPH
- 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 EPH
- List of Nearest Airports to EPH
- Map of Furthest Airports from EPH
- List of Furthest Airports from EPH
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Ephrata Municipal Airport (EPH), Ephrata, Washington, United States would travel a Great Circle distance of 1,399 miles (or 2,251 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 Ephrata Municipal 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: | EPH / KEPH |
Airport Names: |
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Location: | Ephrata, Washington, United States |
GPS Coordinates: | 47°18'29"N by 119°31'0"W |
Area Served: | Ephrata, Washington |
Airport Type: | Public |
Elevation: | 1276 feet (389 meters) |
# of Runways: | 3 |
View all routes: | Routes from EPH |
More Information: | EPH Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- 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.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- Post Field served as a base for flight training for the Air Service.
- 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.
- 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 Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
- 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
Facts about Ephrata Municipal Airport (EPH):
- Ephrata Municipal Airport (EPH) has 3 runways.
- For the 12-month period ending June 28, 2010, the airport had 135,140 general aviation aircraft operations, an average of 370 per day.
- The furthest airport from Ephrata Municipal Airport (EPH) is Tôlanaro Airport (FTU), which is located 10,729 miles (17,266 kilometers) away in Tôlanaro, Madagascar.
- In addition to being known as "Ephrata Municipal Airport", another name for EPH is "Ephrata Army Airfield".
- Parts of the 1989 Steven Spielberg film Always were filmed on the airport.
- The closest airport to Ephrata Municipal Airport (EPH) is Grant County International Airport (MWH), which is located only 12 miles (19 kilometers) SE of EPH.