Nonstop flight route between Fort Sill, Oklahoma, United States and Thanh Hoa, Vietnam:

About this route:

A direct, nonstop flight between Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States and Tho Xuan Airport (THD), Thanh Hoa, Vietnam would travel a Great Circle distance of 8,355 miles (or 13,445 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 Tho Xuan 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 Tho Xuan 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):

• The field was named in honor of pioneer aviator 2d Lieutenant Henry Post.
• 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.
• 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.
• As a result of the United State's entry into World War I, Fort Sill was selected for a primary pilot school.
• With the sudden end of World War I in November 1918, the future operational status of Post Field was unknown.
• The Army will continue to operate and maintain a precision approach radar at Fort Sill's Henry Post Field for the foreseeable future.
• Henry Post Army Airfield (FSI) currently has only 1 runway.
• 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.
• There are no air units currently stationed at the airfield, however air operations for transient units are provided by permanent party personnel.

Facts about Tho Xuan Airport (THD):

• The closest airport to Tho Xuan Airport (THD) is Vinh Airport (VII), which is located 82 miles (131 kilometers) S of THD.
• In addition to being known as "Tho Xuan Airport", other names for THD include "THD[1]" and "VV01[verification needed]".
• The furthest airport from Tho Xuan Airport (THD) is Ilo Airport (ILQ), which is nearly antipodal to Tho Xuan Airport (meaning Tho Xuan Airport is almost on the exact opposite side of the Earth from Ilo Airport), and is located 12,178 miles (19,599 kilometers) away in Ilo, Moquegua Region, Peru.