Nonstop flight route between Fort Sill, Oklahoma, United States and Quincy, Illinois, United States:
Departure Airport:

Arrival Airport:

Distance from FSI to UIN:
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- About this route
- FSI Airport Information
- UIN Airport Information
- Facts about FSI
- Facts about UIN
- 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 UIN
- List of Nearest Airports to UIN
- Map of Furthest Airports from UIN
- List of Furthest Airports from UIN
About this route:
A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Quincy Regional Airport (UIN), Quincy, Illinois, United States would travel a Great Circle distance of 539 miles (or 867 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 Quincy 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: | UIN / KUIN |
Airport Names: |
|
Location: | Quincy, Illinois, United States |
GPS Coordinates: | 39°56'34"N by 91°11'40"W |
Area Served: | Quincy, Illinois |
Operator/Owner: | City of Quincy |
Airport Type: | Public |
Elevation: | 769 feet (234 meters) |
# of Runways: | 3 |
View all routes: | Routes from UIN |
More Information: | UIN Maps & Info |
Facts about Henry Post Army Airfield (FSI):
- Henry Post Army Airfield (FSI) currently has only 1 runway.
- 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.
- Although the Signal corps had been supplying Observation aircraft for the United States Army Field Artillery School since 1915.
- 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 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 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.
- As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
- By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
- 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 Quincy Regional Airport (UIN):
- The closest airport to Quincy Regional Airport (UIN) is Keokuk Municipal Airport (EOK), which is located 38 miles (61 kilometers) NNW of UIN.
- Quincy Regional Airport (UIN) has 3 runways.
- Federal Aviation Administration records say the airport had 2,044 passenger boardings in calendar year 2008, 1,750 in 2009 and 7,783 in 2010.
- On November 6, 2006, Mesa Airlines announced that new non-stop service to Chicago Midway International Airport and Kirksville Regional Airport would begin in February, 2007 operated by subsidiary Air Midwest.
- Because of Quincy Regional Airport's relatively low elevation of 769 feet, planes can take off or land at Quincy 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.
- The furthest airport from Quincy Regional Airport (UIN) is Margaret River Airport (MGV), which is located 10,933 miles (17,594 kilometers) away in Margaret River, Western Australia, Australia.
- In addition to being known as "Quincy Regional Airport", another name for UIN is "Baldwin Field".