Nonstop flight route between Sembach, Germany and Georgetown, Ascension Island, Saint Helena:
Departure Airport:

Arrival Airport:

Distance from SEX to ASI:
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- About this route
- SEX Airport Information
- ASI Airport Information
- Facts about SEX
- Facts about ASI
- Map of Nearest Airports to SEX
- List of Nearest Airports to SEX
- Map of Furthest Airports from SEX
- List of Furthest Airports from SEX
- 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 Sembach KaserneSembach Air Base (SEX), Sembach, Germany and RAF Ascension (ASI), Georgetown, Ascension Island, Saint Helena would travel a Great Circle distance of 4,194 miles (or 6,749 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 Sembach KaserneSembach Air Base 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 Sembach KaserneSembach Air Base 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: | SEX / ETAS |
Airport Name: | Sembach KaserneSembach Air Base |
Location: | Sembach, Germany |
GPS Coordinates: | 49°31'41"N by 7°51'56"E |
Operator/Owner: | United States with authority from Germany |
View all routes: | Routes from SEX |
More Information: | SEX 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 Sembach KaserneSembach Air Base (SEX):
- On 1 January 1957 a fourth squadron, the 19th TRS was transferred from the 47th Bombardment Wing at RAF Sculthorpe to the 66th TRW.
- On 30 November 1954, the 30th TRS received the first Martin RB-57A Canberra, to replace its World War II vintage RB-26 Invaders.
- Sembach's origins date back to 1919 after World War I when French occupation troops used the eastern half of the present flightline as an airfield.
- The furthest airport from Sembach KaserneSembach Air Base (SEX) is Chatham Islands (CHT), which is located 11,992 miles (19,299 kilometers) away in Waitangi, Chatham Islands, New Zealand.
- Although the Air Base was constructed in the French Zone of Occupation under French direction, it was built to be used by NATO forces and was, moreover, intended to be an American Air Base from the beginning.
- The 38th TMW was originally composed of three Tactical Missile groups, the 585th Tactical Missile Group at Bitburg AB, the 586th Tactical Missile Group at Hahn AB, and the 587th Tactical Missile Group at Sembach AB, in addition to a headquarters unit.
- The closest airport to Sembach KaserneSembach Air Base (SEX) is Ramstein Air Base (RMS), which is located only 13 miles (21 kilometers) WSW of SEX.
- With this announcement, and everyone being satisfied, Sembach became a center of activity once more, and construction of the administrative area of the base began in October 1952.
Facts about RAF Ascension (ASI):
- Ascension Island Auxiliary Field was being built by 181 men from Saint Helena by 1957
- Ascension serves as a diversion airport for ETOPS aircraft crossing the Atlantic.
- RAF Ascension Island was re-garrisoned by the RAF in 1982 and used extensively as a staging base during the Falklands War.
- In addition to being known as "RAF Ascension", another name for ASI is "Wideawake Airbase/Field".
- 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.