Nonstop flight route between Cahokia, Illinois (near St. Louis), United States and Chiang Rai, Thailand:

About this route:

A direct, nonstop flight between St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States and Chiang Rai International Airport (CEI), Chiang Rai, Thailand would travel a Great Circle distance of 8,341 miles (or 13,424 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 St. Louis Downtown Airport and Chiang Rai 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 St. Louis Downtown Airport and Chiang Rai 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 St. Louis Downtown Airport (CPS):

• Taken over by the United States Army Air Forces on 1 August 1939 as a basic pilot training airfield.
• The airport opened in 1929 as Curtiss-Steinberg Airport.
• The closest airport to St. Louis Downtown Airport (CPS) is Lambert–St. Louis International Airport (STL), which is located only 16 miles (27 kilometers) NW of CPS.
• The furthest airport from St. Louis Downtown Airport (CPS) is Margaret River Airport (MGV), which is located 10,998 miles (17,700 kilometers) away in Margaret River, Western Australia, Australia.
• The airport closed in 1959 and reopened six years later as Bi-State Parks Airport.
• St. Louis Downtown Airport (CPS) has 3 runways.
• The two survivors out of the airport's original four hangars, Hangar 1 and Hangar 2, are listed on the National Register of Historic Places.
• Because of St. Louis Downtown Airport's relatively low elevation of 413 feet, planes can take off or land at St. Louis Downtown 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.

Facts about Chiang Rai International Airport (CEI):

• 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.
• Chiang Rai International Airport (CEI) currently has only 1 runway.
• The closest airport to Chiang Rai International Airport (CEI) is Tachilek Airport (THL), which is located 37 miles (59 kilometers) N of CEI.
• Chiang Rai International Airport handled 1,053,863 passengers last year.
• A new road which can be accessed by turning left upon exiting the airport also leads southbound to the city centre and is a less congested route, as it is not used by intercity buses heading north.
• In addition to being known as "Chiang Rai International Airport", another name for CEI is "ท่าอากาศยานแม่ฟ้าหลวง เชียงราย".