Nonstop flight route between Yecheon, South Korea and Cahokia, Illinois (near St. Louis), United States:

About this route:

A direct, nonstop flight between Yecheon Air Base (YEC), Yecheon, South Korea and St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States would travel a Great Circle distance of 6,690 miles (or 10,767 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 Yecheon Air Base and St. Louis Downtown 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 Yecheon Air Base and St. Louis Downtown 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 Yecheon Air Base (YEC):

• Yecheon Air Base (YEC) currently has only 1 runway.
• The closest airport to Yecheon Air Base (YEC) is Cheongju International Airport (CJJ), which is located 48 miles (77 kilometers) W of YEC.
• Because of Yecheon Air Base's relatively low elevation of 354 feet, planes can take off or land at Yecheon Air Base 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.
• The furthest airport from Yecheon Air Base (YEC) is Capitán de Corbeta Carlos A. Curbelo International Airport (PDP), which is nearly antipodal to Yecheon Air Base (meaning Yecheon Air Base is almost on the exact opposite side of the Earth from Capitán de Corbeta Carlos A. Curbelo International Airport), and is located 12,208 miles (19,646 kilometers) away in Maldonado/Punta del Este, Maldonado, Uruguay.

Facts about St. Louis Downtown Airport (CPS):

• The airport closed in 1959 and reopened six years later as Bi-State Parks Airport.
• St. Louis Downtown Airport (CPS) has 3 runways.
• 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 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.
• 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.
• 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.
• Taken over by the United States Army Air Forces on 1 August 1939 as a basic pilot training airfield.