Nonstop flight route between Alton, Illinois, United States and Imperatriz, Maranhão, Brazil:

About this route:

A direct, nonstop flight between St. Louis Regional Airport (ALN), Alton, Illinois, United States and Imperatriz-Prefeito Renato Moreira Airport (IMP), Imperatriz, Maranhão, Brazil would travel a Great Circle distance of 4,100 miles (or 6,599 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 Regional Airport and Imperatriz-Prefeito Renato Moreira 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 Regional Airport and Imperatriz-Prefeito Renato Moreira 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 Regional Airport (ALN):

• 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.
• The 2,250 acres airfield sits at 544 ft MSL.
• Civic Memorial Airport opened in 1946 and received its current name in 1984.
• 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.
• 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.
• St. Louis Regional Airport (ALN) has 2 runways.

Facts about Imperatriz-Prefeito Renato Moreira Airport (IMP):

• Because of Imperatriz-Prefeito Renato Moreira Airport's relatively low elevation of 431 feet, planes can take off or land at Imperatriz-Prefeito Renato Moreira 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 furthest airport from Imperatriz-Prefeito Renato Moreira Airport (IMP) is Roman Tmetuchl International Airport (ROR), which is nearly antipodal to Imperatriz-Prefeito Renato Moreira Airport (meaning Imperatriz-Prefeito Renato Moreira Airport is almost on the exact opposite side of the Earth from Roman Tmetuchl International Airport), and is located 12,250 miles (19,714 kilometers) away in Koror, Palau.
• At the end of World War II, the first airport with a 1,200m x 30m earth runway was operational but it was subject to flooding during the rainy season.
• In addition to being known as "Imperatriz-Prefeito Renato Moreira Airport", another name for IMP is "Aeroporto de Imperatriz-Prefeito Renato Moreira".
• The closest airport to Imperatriz-Prefeito Renato Moreira Airport (IMP) is João Correa da Rocha Airport (MAB), which is located 116 miles (187 kilometers) W of IMP.
• Imperatriz-Prefeito Renato Moreira Airport handled 323,940 passengers last year.
• Imperatriz-Prefeito Renato Moreira Airport (IMP) currently has only 1 runway.