Nonstop flight route between Diomede, Alaska, United States and St Athan, Wales, United Kingdom:
Departure Airport:

Arrival Airport:

Distance from DIO to DGX:
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- About this route
- DIO Airport Information
- DGX Airport Information
- Facts about DIO
- Facts about DGX
- Map of Nearest Airports to DIO
- List of Nearest Airports to DIO
- Map of Furthest Airports from DIO
- List of Furthest Airports from DIO
- Map of Nearest Airports to DGX
- List of Nearest Airports to DGX
- Map of Furthest Airports from DGX
- List of Furthest Airports from DGX
About this route:
A direct, nonstop flight between Diomede Heliport (FAA: DM2) (DIO), Diomede, Alaska, United States and MoD St Athan (DGX), St Athan, Wales, United Kingdom would travel a Great Circle distance of 4,305 miles (or 6,929 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 Diomede Heliport (FAA: DM2) 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 Diomede Heliport (FAA: DM2) and MoD St Athan. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | DIO / |
Airport Name: | Diomede Heliport (FAA: DM2) |
Location: | Diomede, Alaska, United States |
GPS Coordinates: | 65°45'29"N by 168°57'6"W |
Elevation: | 0 feet (0 meters) |
View all routes: | Routes from DIO |
More Information: | DIO Maps & Info |
Arrival 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 |
Facts about Diomede Heliport (FAA: DM2) (DIO):
- Despite being separated by the new border after the Alaska purchase in 1867, Big Diomede had been home to families now living on Little Diomede and the people living on the American side of the border were very close relatives to those living on the Russian side.
- The school year 1953–1954 in Little Diomede Island was adapted to better serve the local needs.
- The closest airport to Diomede Heliport (FAA: DM2) (DIO) is Wales Airport (WAA), which is located 26 miles (42 kilometers) ESE of DIO.
- The furthest airport from Diomede Heliport (FAA: DM2) (DIO) is Teniente Rodolfo Marsh Airport (TNM), which is located 10,411 miles (16,755 kilometers) away in Villa Las Estrellas, Antarctica.
- Little Diomede Island is located about 25 miles west from the mainland, in the middle of the Bering Strait.
- Because of Diomede Heliport (FAA: DM2)'s relatively low elevation of 0 feet, planes can take off or land at Diomede Heliport (FAA: DM2) 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.
- An electric system was built on the island in the 1970s and electricity is provided by city-operated Diomede Joint Utilities.
- The island's only school, and likely the most isolated school in the United States, the Diomede School has grades from Pre-K through 12 and approximately 40 students and 5 teachers.
Facts about MoD St Athan (DGX):
- The closest airport to MoD St Athan (DGX) is Cardiff Airport (CWL), which is located only 4 miles (6 kilometers) E of DGX.
- MoD St Athan (DGX) currently has only 1 runway.
- 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 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.
- 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.
- The MOD continued to negotiate the project with the Metrix Consortium, but the price rose several times, reaching £14 billion in mid-2009.
- In March 2003 it was confirmed that a new hi-tech maintenance centre would be built, creating 3,300 jobs.