Nonstop flight route between Ust-Kut, Irkutsk Oblast, Russia and Fort Sill, Oklahoma, United States:

About this route:

A direct, nonstop flight between Ust-Kut Airport (UKX), Ust-Kut, Irkutsk Oblast, Russia and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 5,959 miles (or 9,589 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 large distance between Ust-Kut Airport and Henry Post Army Airfield, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between Ust-Kut Airport and Henry Post Army Airfield. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about Ust-Kut Airport (UKX):

• In addition to being known as "Ust-Kut Airport", another name for UKX is "Аэропорт Усть-Кут".
• The closest airport to Ust-Kut Airport (UKX) is Kirensk Airport (KCK), which is located 108 miles (173 kilometers) NE of UKX.
• During World War II an airfield was built here for the Alaska-Siberian air route used to ferry American Lend-Lease aircraft to the Eastern Front.
• The furthest airport from Ust-Kut Airport (UKX) is Ushuaia International Airport (USH), which is nearly antipodal to Ust-Kut Airport (meaning Ust-Kut Airport is almost on the exact opposite side of the Earth from Ushuaia International Airport), and is located 12,167 miles (19,580 kilometers) away in Ushuaia, Tierra del Fuego, Argentina.
• In 2007 a controlling stake in "JSC "Aeroport Ust-Kut"".  has acquired the airline "UTair" planning to use it as their main base in Eastern Siberia.
• Ust-Kut Airport (UKX) currently has only 1 runway.
• Reconstruction plan for the airport is included in the federal program of revival of significant airports, but in 2009 the airport "Ust-Kut" is "not necessarily important for the partners." Despite this, according to the General Director of JSC "Ust-Kut Airport" by Yuri Samorokov, it is expected that full-scale reconstruction would still be carried out in 2015.
• Ust-Kut Airport handled 24,291 passengers last year.

Facts about Henry Post Army Airfield (FSI):

• Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States.
• 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.
• After returning from combat duty in France, a cadre of the 135th Aero Squadron ) was assigned to Post Field as an observation squadron, supplying aircraft for the United States Army Field Artillery School at Fort Sill and supported Army units at Fort Leavenworth, Kansas.
• Air Service/Corps units assigned to Post Field between 1919 and 1941
• 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 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.
• 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.