Nonstop flight route between Butte, Montana, United States and Diomede, Alaska, United States:
Departure Airport:

Arrival Airport:

Distance from BTM to DIO:
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- About this route
- BTM Airport Information
- DIO Airport Information
- Facts about BTM
- Facts about DIO
- Map of Nearest Airports to BTM
- List of Nearest Airports to BTM
- Map of Furthest Airports from BTM
- List of Furthest Airports from BTM
- Map of Nearest Airports to DIO
- List of Nearest Airports to DIO
- Map of Furthest Airports from DIO
- List of Furthest Airports from DIO
About this route:
A direct, nonstop flight between Bert Mooney Airport (BTM), Butte, Montana, United States and Diomede Heliport (FAA: DM2) (DIO), Diomede, Alaska, United States would travel a Great Circle distance of 2,459 miles (or 3,958 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 relatively short distance between Bert Mooney Airport and Diomede Heliport (FAA: DM2), the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | BTM / KBTM |
Airport Name: | Bert Mooney Airport |
Location: | Butte, Montana, United States |
GPS Coordinates: | 45°57'16"N by 112°29'51"W |
Area Served: | Butte, Montana |
Operator/Owner: | Bert Mooney Airport Authority |
Airport Type: | Public |
Elevation: | 5550 feet (1,692 meters) |
# of Runways: | 2 |
View all routes: | Routes from BTM |
More Information: | BTM Maps & Info |
Arrival 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 |
Facts about Bert Mooney Airport (BTM):
- Because of Bert Mooney Airport's high elevation of 5,550 feet, planes must typically fly at a faster airspeed in order to takeoff or land at BTM. Combined with a high temperature, this could make BTM a "Hot & High" airport, where the air density is lower than it would otherwise be at sea level.
- On March 22, 2009 a Pilatus PC-12 flying in from Oroville, California crashed in Holy Cross Cemetery 500 feet from the airport, killing all 14 people on board.
- Bert Mooney Airport (BTM) has 2 runways.
- The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service facility.Federal Aviation Administration records say the airport had 30,431 passenger boardings in calendar year 2008, 25,178 in 2009 and 25,433 in 2010.
- The airport name was changed in 1972 to honor Bert Mooney, an aviator from Butte who was the first to fly mail into Yellowstone National Park in 1935.
- The closest airport to Bert Mooney Airport (BTM) is Dillon Airport (DLN), which is located 48 miles (78 kilometers) S of BTM.
- The furthest airport from Bert Mooney Airport (BTM) is Sir Gaëtan Duval Airport (RRG), which is located 10,611 miles (17,077 kilometers) away in Rodrigues Island, Mauritius.
Facts about Diomede Heliport (FAA: DM2) (DIO):
- While other emergency services are provided by volunteers and a health aide, the fire and rescue service is provided by Diomede Volunteer Fire Department and First Responders.
- The current location of the city, which is believed to be at least 3,000 years old by some archaeologists, was originally a spring hunting campsite and the early explorers from the west found the Iñupiat at Diomede had an advanced culture including their elaborate whale hunting ceremonies.
- The closest airport to Diomede Heliport (FAA: DM2) (DIO) is Wales Airport (WAA), which is located 26 miles (42 kilometers) ESE of DIO.
- The median income for a household in the city was $23,750, and the median income for a family was $24,583.
- Today there are about 30 buildings on the island, including the residential housing that was mainly built in the 1970s and 1980s.
- 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.
- At the beginning of the Cold War in the late 1940s Big Diomede became a Russian military base and all its native residents were removed to mainland Russia.
- 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.
- Funds for improving the water system have been requested both by the city and the school.
- According to Arthur Ahkinga, who lived on Little Diomede island at the turn of the 1940s, the Iñupiat on the island made their living by hunting and carving ivory which they traded or sold.