Nonstop flight route between Chiang Rai, Thailand and Fort Sill, Oklahoma, United States:

About this route:

A direct, nonstop flight between Chiang Rai International Airport (CEI), Chiang Rai, Thailand and Henry Post Army Airfield (FSI), Fort Sill, Oklahoma, United States would travel a Great Circle distance of 8,478 miles (or 13,643 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 Chiang Rai International 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 Chiang Rai International 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 Chiang Rai International Airport (CEI):

• Chiang Rai International Airport handled 1,053,863 passengers last year.
• Chiang Rai International Airport (CEI) currently has only 1 runway.
• It consists of a single passenger terminal which features a Dairy Queen outlet as well as a Black Canyon Coffee along with several other shops, with both the international and domestic arrivals and departures handled on the same floor but in separate areas.
• In addition to being known as "Chiang Rai International Airport", another name for CEI is "ท่าอากาศยานแม่ฟ้าหลวง เชียงราย".
• The closest airport to Chiang Rai International Airport (CEI) is Tachilek Airport (THL), which is located 37 miles (59 kilometers) N of CEI.
• The airport's IATA code is CEI and economical flights are made several times daily to Bangkok-Suvarnabhumi which is a regional hub airport with daily flights to every major city in the world.
• The furthest airport from Chiang Rai International Airport (CEI) is Maria Reiche Neuman Airport (NZC), which is located 11,947 miles (19,227 kilometers) away in Nazca, Ica Region, Peru.
• The airport is located about 10 km from the city centre.

Facts about Henry Post Army Airfield (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.
• Post Field served as a base for flight training for the Air Service.
• 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 field was named in honor of pioneer aviator 2d Lieutenant Henry Post.