Nonstop flight route between Sembach, Germany and Roundup, Montana, United States:
Departure Airport:

Arrival Airport:

Distance from SEX to RPX:
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- About this route
- SEX Airport Information
- RPX Airport Information
- Facts about SEX
- Facts about RPX
- 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 RPX
- List of Nearest Airports to RPX
- Map of Furthest Airports from RPX
- List of Furthest Airports from RPX
About this route:
A direct, nonstop flight between Sembach KaserneSembach Air Base (SEX), Sembach, Germany and Roundup Airport (RPX), Roundup, Montana, United States would travel a Great Circle distance of 4,791 miles (or 7,711 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 Roundup 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 Sembach KaserneSembach Air Base and Roundup Airport. 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: | RPX / KRPX |
Airport Name: | Roundup Airport |
Location: | Roundup, Montana, United States |
GPS Coordinates: | 46°28'30"N by 108°32'35"W |
Area Served: | Roundup, Montana |
Operator/Owner: | City of Roundup & Musselshell County |
Airport Type: | Public |
Elevation: | 3490 feet (1,064 meters) |
# of Runways: | 2 |
View all routes: | Routes from RPX |
More Information: | RPX Maps & Info |
Facts about Sembach KaserneSembach Air Base (SEX):
- In the middle of April 1952, the residents of Sembach learned that the land to the north of the now completed flightline was to be used for the construction of multi-story barracks and office buildings.
- On 30 November 1954, the 30th TRS received the first Martin RB-57A Canberra, to replace its World War II vintage RB-26 Invaders.
- 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.
- 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.
- In January 1958, it was announced that the 66th TRW would transition to the RF-101 Voodoo.
- During the Cold War, Sembach Air Base housed a variety of USAF Tactical Reconnaissance, Close Air Support and Tactical Air Control units as a front line NATO air base.
- Many workers were brought in to build the new base, and the village of Sembach took on the character of a boomtown.
Facts about Roundup Airport (RPX):
- The furthest airport from Roundup Airport (RPX) is Sir Gaëtan Duval Airport (RRG), which is located 10,535 miles (16,954 kilometers) away in Rodrigues Island, Mauritius.
- The closest airport to Roundup Airport (RPX) is Billings Logan International Airport (BIL), which is located 46 miles (74 kilometers) S of RPX.
- Roundup Airport (RPX) has 2 runways.