Nonstop flight route between Cahokia, Illinois (near St. Louis), United States and Ampanihy, Madagascar:
Departure Airport:

Arrival Airport:

Distance from CPS to AMP:
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- About this route
- CPS Airport Information
- AMP Airport Information
- Facts about CPS
- Facts about AMP
- Map of Nearest Airports to CPS
- List of Nearest Airports to CPS
- Map of Furthest Airports from CPS
- List of Furthest Airports from CPS
- Map of Nearest Airports to AMP
- List of Nearest Airports to AMP
- Map of Furthest Airports from AMP
- List of Furthest Airports from AMP
About this route:
A direct, nonstop flight between St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States and Ampanihy Airport (AMP), Ampanihy, Madagascar would travel a Great Circle distance of 9,647 miles (or 15,526 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 Ampanihy 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 Ampanihy Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | CPS / KCPS |
Airport Name: | St. Louis Downtown Airport |
Location: | Cahokia, Illinois (near St. Louis), United States |
GPS Coordinates: | 38°34'14"N by 90°9'21"W |
Area Served: | Greater St. Louis |
Operator/Owner: | Bi-State Development Agency |
Airport Type: | Public |
Elevation: | 413 feet (126 meters) |
# of Runways: | 3 |
View all routes: | Routes from CPS |
More Information: | CPS Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | AMP / FMSY |
Airport Name: | Ampanihy Airport |
Location: | Ampanihy, Madagascar |
GPS Coordinates: | 24°41'58"S by 44°43'59"E |
View all routes: | Routes from AMP |
More Information: | AMP Maps & Info |
Facts about St. Louis Downtown Airport (CPS):
- The airport opened in 1929 as Curtiss-Steinberg Airport.
- 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.
- 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.
- The airport closed in 1959 and reopened six years later as Bi-State Parks Airport.
Facts about Ampanihy Airport (AMP):
- The furthest airport from Ampanihy Airport (AMP) is Vandenberg Air Force Base (VBG), which is located 11,317 miles (18,213 kilometers) away in Lompoc, California, United States.
- The closest airport to Ampanihy Airport (AMP) is Tôlanaro Airport (FTU), which is located 141 miles (227 kilometers) E of AMP.