Nonstop flight route between St Athan, Wales, United Kingdom and Roundup, Montana, United States:
Departure Airport:
(51°24'16"N by 3°26'8"W)
Arrival Airport:
(46°28'30"N by 108°32'35"W)
Distance from DGX to RPX:
4,349.60 miles (6,999.98 km)
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Jump to:
- About this route
- DGX Airport Information
- RPX Airport Information
- Facts about DGX
- Facts about RPX
- Map of Nearest Airports to DGX
- List of Nearest Airports to DGX
- Map of Furthest Airports from DGX
- List of Furthest Airports from DGX
- 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 MoD St Athan (DGX), St Athan, Wales, United Kingdom and Roundup Airport (RPX), Roundup, Montana, United States 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 MoD St Athan 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 MoD St Athan 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: | DGX / EGDX |
| Airport Name: | MoD St Athan |
| Location: | St Athan, Wales, United Kingdom |
| GPS Coordinates: | 51°24'16"N by 3°26'8"W |
| Operator/Owner: | Ministry of Defence |
| Airport Type: | Military |
| Elevation: | 163 feet (50 meters) |
| # of Runways: | 1 |
| View all routes: | Routes from DGX |
| More Information: | DGX 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 MoD St Athan (DGX):
- 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.
- MoD St Athan (DGX) currently has only 1 runway.
- On 26 August 1993 an ATC civilian instructor was seriously injured and the RAF Volunteer Reserve pilot, Group Captain Roger Sweatman, was killed when their Chipmunk trainer, on an air experience flight, crashed after encountering difficulties during a simulated emergency low-height manoeuvre on take-off.
- During the 1960s, a driving school was established.
- 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 closest airport to MoD St Athan (DGX) is Cardiff Airport (CWL), which is located only 4 miles (6 kilometers) E of DGX.
- The training to be carried out at St Athan was to be specialist phase 2 and phase 3 engineering courses of the Royal Navy, Army and Royal Air Force.
Facts about Roundup Airport (RPX):
- Roundup Airport (RPX) has 2 runways.
- 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.
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 4.03 miles (6.48 km) E | Cardiff Airport (CWL) | Cardiff, Wales, United Kingdom |     |
| 2 | 30.51 miles (49.10 km) WNW | Swansea Airport (SWS) | Swansea, Wales, United Kingdom | |
| 3 | 30.93 miles (49.78 km) E | Bristol Airport (BRS) | Bristol, England, United Kingdom | |
| 4 | 37.11 miles (59.72 km) ENE | Bristol Filton Airport (FZO) | Filton, Bristol, United Kingdom | |
| 5 | 46.32 miles (74.55 km) S | Exeter International Airport (EXT) | Exeter, United Kingdom | |
| 6 | 62.49 miles (100.57 km) E | RAF Lyneham (LYE) | Wiltshire, England, United Kingdom | |
| 7 | 71.81 miles (115.57 km) WNW | Haverfordwest Aerodrome (HAW) | Haverfordwest, Wales, United Kingdom | |
| 8 | 73.27 miles (117.92 km) ENE | RAF Fairford (FFD) | Fairford, England, United Kingdom | |
| 9 | 73.86 miles (118.86 km) SSW | Plymouth City Airport (PLH) | Plymouth, United Kingdom | |
| 10 | 81.51 miles (131.17 km) ESE | Bournemouth Airport (BOH) | Bournemouth, England, United Kingdom | |
| 11 | 83.03 miles (133.62 km) ENE | RAF Brize Norton (BZZ) | Oxfordshire, England, United Kingdom | |
| 12 | 95.12 miles (153.08 km) SW | Newquay Cornwall Airport (NQY) | Newquay, England, United Kingdom | |
| 13 | 95.37 miles (153.49 km) ESE | Southampton Airport (SOU) | Eastleigh (near Southampton), England, United Kingdom | |
| 14 | 95.55 miles (153.77 km) ENE | Oxford Airport (OXF) | Oxford, England, United Kingdom | |
| 15 | 101.68 miles (163.63 km) E | RAF Benson (BEX) | Benson, Oxfordshire, England, United Kingdom | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 11,960.14 miles (19,247.92 km) SE | Dunedin International Airport (DUD) | Dunedin, Otago, New Zealand | |
| 2 | 11,944.25 miles (19,222.36 km) SE | Ryan's Creek Aerodrome (SZS) | Stewart Island, New Zealand | |
| 3 | 11,928.05 miles (19,196.29 km) SE | Invercargill Airport (IVC) | Invercargill, New Zealand | |
| 4 | 11,925.82 miles (19,192.70 km) SSE | Oamaru Airport (OAM) | Oamaru, North Otago, New Zealand | |
| 5 | 11,896.69 miles (19,145.83 km) SE | Alexandra Aerodrome (ALR) | Alexandra, New Zealand | |
| 6 | 11,887.56 miles (19,131.13 km) SSE | Richard Pearse Airport (Timaru Airport) (TIU) | Timaru, New Zealand | |
| 7 | 11,873.31 miles (19,108.18 km) SSE | Ashburton Aerodrome (ASG) | Ashburton, New Zealand | |
| 8 | 11,867.95 miles (19,099.57 km) SE | Queenstown Airport (ZQN) | Queenstown, New Zealand | |
| 9 | 11,865.25 miles (19,095.23 km) SE | Wanaka Airport (WKA) | Wanaka, New Zealand | |
| 10 | 11,858.59 miles (19,084.51 km) SSE | Christchurch International Airport (CHC) | Christchurch, New Zealand | |
| 11 | 11,838.92 miles (19,052.84 km) SSE | Glentanner Aerodrome (GTN) | Mount Cook, New Zealand | |
| 12 | 11,830.51 miles (19,039.32 km) SSE | Mount Cook Airport (MON) | Mount Cook, New Zealand | |
| 13 | 11,824.73 miles (19,030.01 km) SE | Milford Sound Airport (MFN) | Milford Sound, New Zealand | |
| 14 | 11,820.15 miles (19,022.64 km) SW | Chatham Islands (CHT) | Waitangi, Chatham Islands, New Zealand | |
| 15 | 11,809.12 miles (19,004.89 km) SSE | Fox Glacier Aerodrome (FGL) | Fox Glacier, New Zealand | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 46.10 miles (74.19 km) S | Billings Logan International Airport (BIL) | Billings, Montana, United States | |
| 2 | 59.02 miles (94.99 km) NW | Lewistown Municipal Airport (LWT) | Lewistown, Montana, United States | |
| 3 | 95.49 miles (153.67 km) NE | Jordan Airport (JDN) | Jordan, Montana, United States | |
| 4 | 105.84 miles (170.33 km) WSW | Mission Field (LVM) | Livingston, Montana, United States | |
| 5 | 126.53 miles (203.63 km) E | Miles City Airport (MLS) | Miles City, Montana, United States | |
| 6 | 133.88 miles (215.46 km) WSW | Bozeman Yellowstone International Airport (BZN) | Bozeman, Montana, United States | |
| 7 | 137.05 miles (220.56 km) S | Yellowstone Regional Airport (COD) | Cody, Wyoming, United States | |
| 8 | 139.98 miles (225.28 km) SSE | Sheridan County Airport (SHR) | Sheridan, Wyoming, United States | |
| 9 | 143.48 miles (230.90 km) WNW | Malmstrom Air Force Base (GFA) | Great Falls, Montana, United States | |
| 10 | 150.20 miles (241.73 km) NE | Glasgow International Airport (GGW) | Glasgow, Montana, United States | |
| 11 | 150.36 miles (241.97 km) WNW | Great Falls International Airport (GTF) | Great Falls, Montana, United States | |
| 12 | 153.79 miles (247.50 km) NNW | Havre City-County Airport (HVR) | Havre, Montana, United States | |
| 13 | 163.70 miles (263.45 km) W | Helena Regional Airport (HLN) | Helena, Montana, United States | |
| 14 | 175.30 miles (282.12 km) SW | Yellowstone Airport (WYS) | West Yellowstone, Montana, United States | |
| 15 | 175.96 miles (283.18 km) S | Worland Municipal Airport (WRL) | Worland, Wyoming, United States | |
| Rank | Distance & Direction | Airport Name & IATA Code | Airport Location | Further Actions |
| 1 | 10,534.71 miles (16,953.93 km) SSE | Sir Gaëtan Duval Airport (RRG) | Rodrigues Island, Mauritius | |
| 2 | 10,479.36 miles (16,864.85 km) SSE | Pierrefonds Airport (ZSE) | Saint-Pierre, Réunion | |
| 3 | 10,476.57 miles (16,860.37 km) SSE | Sir Seewoosagur Ramgoolam International Airport (MRU) | Plaisance, Mauritius | |
| 4 | 10,454.31 miles (16,824.54 km) SSE | Roland Garros Airport (RUN) | St Denis, Réunion, France | |
| 5 | 10,433.23 miles (16,790.61 km) SE | Tôlanaro Airport (FTU) | Tôlanaro, Madagascar | |
| 6 | 10,330.91 miles (16,625.95 km) SE | Ampanihy Airport (AMP) | Ampanihy, Madagascar | |
| 7 | 10,261.65 miles (16,514.48 km) SE | Mananjary Airport (MNJ) | Mananjary, Madagascar | |
| 8 | 10,233.41 miles (16,469.03 km) SE | Fianarantsoa Airport (WFI) | Fianarantsoa, Madagascar | |
| 9 | 10,132.24 miles (16,306.22 km) SE | Manja Airport (MJA) | Manja, Menabe, Madagascar | |
| 10 | 10,132.23 miles (16,306.21 km) SE | Andavadoaka Airport (DVD) | Andavadoaka, Toliara province, Atsimo-Andrefana region, Madagascar | |
| 11 | 10,116.24 miles (16,280.48 km) SE | Morombe Airport (MXM) | Morombe, Madagascar | |
| 12 | 10,108.66 miles (16,268.28 km) SE | Toamasino Airport (TMM) | Toamasina, Madagascar | |
| 13 | 10,089.56 miles (16,237.54 km) SE | Ivato International Airport (TNR) | Antananarivo, Madagascar | |
| 14 | 10,066.19 miles (16,199.92 km) SE | Miandrivazo Airport (ZVA) | Miandrivazo, Madagascar | |
| 15 | 10,059.04 miles (16,188.42 km) SE | Sainte Marie Airport (SMS) | Île Sainte-Marie, Madagascar | |