Nonstop flight route between Roundup, Montana, United States and St Athan, Wales, United Kingdom:

About this route:

A direct, nonstop flight between Roundup Airport (RPX), Roundup, Montana, United States and MoD St Athan (DGX), St Athan, Wales, United Kingdom would travel a Great Circle distance of 4,350 miles (or 7,000 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 Roundup Airport and MoD St Athan, 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 Roundup Airport and MoD St Athan. 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 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.
• Roundup Airport (RPX) has 2 runways.
• The closest airport to Roundup Airport (RPX) is Billings Logan International Airport (BIL), which is located 46 miles (74 kilometers) S of RPX.

Facts about MoD St Athan (DGX):

• The only squadrons to operate out of St Athan on a regular basis are the University of Wales Air Squadron, flying Grob Tutors and No 634 Volunteer Gliding Squadron using Vigilant T.1s.
• The last aircraft to be serviced at St Athan, a Vickers VC10, departed the site on 23 February 2012.
• MoD St Athan (DGX) currently has only 1 runway.
• MOD St Athan is a large Ministry of Defence unit near the village of St Athan in the Vale of Glamorgan, southern Wales.
• The closest airport to MoD St Athan (DGX) is Cardiff Airport (CWL), which is located only 4 miles (6 kilometers) E of DGX.
• Because of MoD St Athan's relatively low elevation of 163 feet, planes can take off or land at MoD St Athan 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 MoD St Athan (DGX) is Dunedin International Airport (DUD), which is located 11,960 miles (19,248 kilometers) away in Dunedin, Otago, New Zealand.
• In March 2003 it was confirmed that a new hi-tech maintenance centre would be built, creating 3,300 jobs.
• St Athan also became the major RAF maintenance base for Vulcan, Victor, Buccaner, Phantom, Harrier, Tornado, Jaguar, Hawk and VC10 aircraft, originally under direct RAF control, but latterly under the auspices of the Defence Aviation Repair Agency.
• In 2009 building work was due to commence on a new defence training academy with its heart at St Athan.
• During the war a dummy airfield was built using wood and cardboard a few miles west of the original airfield and successful efforts were made to hide the proper field.