Nonstop flight route between Okinawa, Japan and Alton, Illinois, United States:

About this route:

A direct, nonstop flight between Naha Airport (OKA), Okinawa, Japan and St. Louis Regional Airport (ALN), Alton, Illinois, United States would travel a Great Circle distance of 7,323 miles (or 11,786 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 Naha Airport and St. Louis Regional 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 Naha Airport and St. Louis Regional 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 Naha Airport (OKA):

• Air America operated interisland flights to Miyako and Ishigaki from 1964 to 1967, when Southwest Airlines took over these routes.
• The closest airport to Naha Airport (OKA) is Kadena Air Base 嘉手納飛行場 Kadena Hikōjō (DNA), which is located only 13 miles (21 kilometers) NE of OKA.
• Because of Naha Airport's relatively low elevation of 11 feet, planes can take off or land at Naha 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.
• Congested Naha Airport served 14,495,054 passengers in FY2006, roughly similar numbers in 2012.
• In addition to being known as "Naha Airport", other names for OKA include "那覇空港" and "Naha Kūkō".
• The furthest airport from Naha Airport (OKA) is Paulo Abdala Airport (FBE), which is nearly antipodal to Naha Airport (meaning Naha Airport is almost on the exact opposite side of the Earth from Paulo Abdala Airport), and is located 12,392 miles (19,943 kilometers) away in Francisco Beltrao, Paraná, Brazil.
• Naha Airport (OKA) currently has only 1 runway.
• The basic and detailed design engineering works in addition to the later construction management phase of the main passenger terminal were awarded in the 1990s in part to the Japan Branch of the American design-build engineering company, The Austin Company, which joined Japanese firms in a joint venture design consortium.
• The hub began operations in 2009.

Facts about St. Louis Regional Airport (ALN):

• Its operations are paid for by an airport taxation district created in 1946, which collects taxes from property owners in the Madison County townships of Alton, Wood River, Foster and Fort Russell.
• The furthest airport from St. Louis Regional Airport (ALN) is Margaret River Airport (MGV), which is located 11,002 miles (17,706 kilometers) away in Margaret River, Western Australia, Australia.
• St. Louis Regional Airport (ALN) has 2 runways.
• The closest airport to St. Louis Regional Airport (ALN) is Lambert–St. Louis International Airport (STL), which is located only 20 miles (32 kilometers) WSW of ALN.
• The 2,250 acres airfield sits at 544 ft MSL.
• Because of St. Louis Regional Airport's relatively low elevation of 544 feet, planes can take off or land at St. Louis Regional 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.
• Civic Memorial Airport opened in 1946 and received its current name in 1984.