Nonstop flight route between Fort Sill, Oklahoma, United States and Ulan Bator, Mongolia:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Chinggis Khaan International Airport (ULN), Ulan Bator, Mongolia would travel a Great Circle distance of 6,528 miles (or 10,506 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 Henry Post Army Airfield and Chinggis Khaan International Airport, 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 Henry Post Army Airfield and Chinggis Khaan International Airport. 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 Henry Post Army Airfield (FSI):

• Henry Post Army Airfield (FSI) currently has only 1 runway.
• 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 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.
• 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.
• Henry Post AAF has one runway designated 17/35 with a concrete surface measuring 5,001 by 200 feet.
• Air Service/Corps units assigned to Post Field between 1919 and 1941
• By the late 1920s, the World War I tarpaper buildings were rotting and turning into fire hazards.

Facts about Chinggis Khaan International Airport (ULN):

• The airport was named after Chinggis Khaan to celebrate the 800th anniversary of the establishment of a Mongolian State on 21 December 2005.
• Chinggis Khaan International Airport is the international airport serving Ulaanbaatar, Mongolia, situated 18 km southwest of the capital.
• Chinggis Khaan International Airport handled 1,098,865 passengers last year.
• The furthest airport from Chinggis Khaan International Airport (ULN) is Cochrane Airfield (LGR), which is nearly antipodal to Chinggis Khaan International Airport (meaning Chinggis Khaan International Airport is almost on the exact opposite side of the Earth from Cochrane Airfield), and is located 12,386 miles (19,933 kilometers) away in Cochrane, Chile.
• In addition to being known as "Chinggis Khaan International Airport", another name for ULN is "Чингис хаан олон улсын нисэх буудалᠴᠢᠩᠭᠢᠰ ᠬᠠᠭᠠᠨ ᠣᠯᠠᠨ ᠤᠯᠤᠰ  ᠦᠨ ᠨᠢᠰᠬᠦ ᠪᠠᠭᠤᠳᠠᠯ".
• The airport was first established as Buyant-Ukhaa airport on 19 February 1957.
• Chinggis Khaan International Airport (ULN) has 2 runways.
• Because of Chinggis Khaan International Airport's high elevation of 4,364 feet, planes must typically fly at a faster airspeed in order to takeoff or land at ULN. Combined with a high temperature, this could make ULN a "Hot & High" airport, where the air density is lower than it would otherwise be at sea level.
• The closest airport to Chinggis Khaan International Airport (ULN) is Mandalgovi Airport (MXW), which is located 145 miles (234 kilometers) S of ULN.