Nonstop flight route between Fort Sill, Oklahoma, United States and Baytown, Texas, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to HPY:
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- About this route
- FSI Airport Information
- HPY Airport Information
- Facts about FSI
- Facts about HPY
- 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 HPY
- List of Nearest Airports to HPY
- Map of Furthest Airports from HPY
- List of Furthest Airports from HPY
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Baytown Airport (HPY), Baytown, Texas, United States would travel a Great Circle distance of 392 miles (or 631 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 Baytown 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: | HPY / KHPY |
Airport Name: | Baytown Airport |
Location: | Baytown, Texas, United States |
GPS Coordinates: | 29°47'9"N by 94°57'10"W |
Area Served: | Baytown, Texas |
Operator/Owner: | Raceco Inc. |
Airport Type: | Public |
Elevation: | 34 feet (10 meters) |
# of Runways: | 1 |
View all routes: | Routes from HPY |
More Information: | HPY Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- 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.
- 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.
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
- 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.
- 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.
- 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 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 Baytown Airport (HPY):
- Baytown Airport (HPY) currently has only 1 runway.
- Because of Baytown Airport's relatively low elevation of 34 feet, planes can take off or land at Baytown 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.
- The closest airport to Baytown Airport (HPY) is Ellington Field Joint Reserve BaseEllington Air Force BaseEllington Field (EFD), which is located only 17 miles (28 kilometers) SW of HPY.
- For a complete listing, see list of cities and towns in Houston–The Woodlands–Sugar Land MSA
- The furthest airport from Baytown Airport (HPY) is Cocos (Keeling) Island Airport (CCK), which is located 11,005 miles (17,711 kilometers) away in Cocos Islands, Australia.
- In 2009 Herman Life Flight opened their new East Base on the airport property with one helicopter and crew accommodations.