Nonstop flight route between Selma, Alabama, United States and Georgetown, Ascension Island, Saint Helena:
Departure Airport:

Arrival Airport:

Distance from SEM to ASI:
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- About this route
- SEM Airport Information
- ASI Airport Information
- Facts about SEM
- Facts about ASI
- Map of Nearest Airports to SEM
- List of Nearest Airports to SEM
- Map of Furthest Airports from SEM
- List of Furthest Airports from SEM
- Map of Nearest Airports to ASI
- List of Nearest Airports to ASI
- Map of Furthest Airports from ASI
- List of Furthest Airports from ASI
About this route:
A direct, nonstop flight between Craig Field (SEM), Selma, Alabama, United States and RAF Ascension (ASI), Georgetown, Ascension Island, Saint Helena would travel a Great Circle distance of 5,518 miles (or 8,880 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 Craig Field and RAF Ascension, 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 Craig Field and RAF Ascension. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | SEM / KSEM |
Airport Name: | Craig Field |
Location: | Selma, Alabama, United States |
GPS Coordinates: | 32°20'38"N by 86°59'16"W |
Area Served: | Selma, Alabama |
Operator/Owner: | Craig Field Airport & Industrial Authority |
Airport Type: | Public |
Elevation: | 166 feet (51 meters) |
# of Runways: | 1 |
View all routes: | Routes from SEM |
More Information: | SEM Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | ASI / FHAW |
Airport Names: |
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Location: | Georgetown, Ascension Island, Saint Helena |
GPS Coordinates: | 7°58'9"S by 14°23'38"W |
Operator/Owner: | Ministry of Defence |
View all routes: | Routes from ASI |
More Information: | ASI Maps & Info |
Facts about Craig Field (SEM):
- Craig Field (SEM) currently has only 1 runway.
- Because of Craig Field's relatively low elevation of 166 feet, planes can take off or land at Craig Field 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 closest airport to Craig Field (SEM) is Montgomery Regional Airport (MGM), which is located 35 miles (56 kilometers) E of SEM.
- Craig Field is a public-use airport located four nautical miles southeast of the central business district of Selma, a city in Dallas County, Alabama, United States.
- Craig Field covers an area of 1,790 acres at an elevation of 166 feet above mean sea level.
- Although the former USAF air traffic control tower at Craig Field remains standing, as of 2007 it was unmanned and non-operational, with UNICOM being used as a common traffic advisory frequency.
- The furthest airport from Craig Field (SEM) is Margaret River Airport (MGV), which is located 11,157 miles (17,955 kilometers) away in Margaret River, Western Australia, Australia.
Facts about RAF Ascension (ASI):
- The Target Tracking Radar Station was a Nike Zeus test facility for tracking reentry vehicles from Cape Canaveral missile launches.
- In addition to being known as "RAF Ascension", another name for ASI is "Wideawake Airbase/Field".
- RAF Ascension Island is also the refuelling point for the Ministry of Defence's South Atlantic Air Bridge flights to RAF Mount Pleasant, on the Falkland Islands, from RAF Brize Norton in Oxfordshire, in the UK.
- The furthest airport from RAF Ascension (ASI) is Ujae Airport (UJE), which is nearly antipodal to RAF Ascension (meaning RAF Ascension is almost on the exact opposite side of the Earth from Ujae Airport), and is located 12,370 miles (19,907 kilometers) away in Ujae Atoll, Marshall Islands.
- The closest airport to RAF Ascension (ASI) is Sasstown Airport (SAZ), which is located 965 miles (1,553 kilometers) NNE of ASI.