Nonstop flight route between Fort Sill, Oklahoma, United States and Yankton, South Dakota, United States:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Chan Gurney Municipal Airport (YKN), Yankton, South Dakota, United States would travel a Great Circle distance of 574 miles (or 923 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 Chan Gurney Municipal Airport, the route shown on this map most likely still appears to be a straight line.

Departure Airport Information:

Arrival Airport Information:

Facts about Henry Post Army Airfield (FSI):

• 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.
• Henry Post Army Airfield (FSI) currently has only 1 runway.
• By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.
• The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
• 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.
• 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.
• 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 AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.

Facts about Chan Gurney Municipal Airport (YKN):

• Because of Chan Gurney Municipal Airport's relatively low elevation of 398 feet, planes can take off or land at Chan Gurney Municipal 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 Chan Gurney Municipal Airport (YKN) is Sioux Falls Regional Airport (FSD), which is located 56 miles (91 kilometers) NE of YKN.
• Chan Gurney Municipal Airport (YKN) has 2 runways.
• The furthest airport from Chan Gurney Municipal Airport (YKN) is Margaret River Airport (MGV), which is located 10,586 miles (17,036 kilometers) away in Margaret River, Western Australia, Australia.