Nonstop flight route between Atwater, California, United States and Butte, Montana, United States:
Departure Airport:

Arrival Airport:

Distance from MER to BTM:
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- About this route
- MER Airport Information
- BTM Airport Information
- Facts about MER
- Facts about BTM
- Map of Nearest Airports to MER
- List of Nearest Airports to MER
- Map of Furthest Airports from MER
- List of Furthest Airports from MER
- Map of Nearest Airports to BTM
- List of Nearest Airports to BTM
- Map of Furthest Airports from BTM
- List of Furthest Airports from BTM
About this route:
A direct, nonstop flight between Castle Airport (MER), Atwater, California, United States and Bert Mooney Airport (BTM), Butte, Montana, United States would travel a Great Circle distance of 723 miles (or 1,164 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 Castle Airport and Bert Mooney Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | MER / KMER |
Airport Name: | Castle Airport |
Location: | Atwater, California, United States |
GPS Coordinates: | 37°22'50"N by 120°34'5"W |
Operator/Owner: | Merced County Department of Commerce, Aviation, and Economic Development |
Airport Type: | Public |
Elevation: | 191 feet (58 meters) |
# of Runways: | 1 |
View all routes: | Routes from MER |
More Information: | MER Maps & Info |
Arrival 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 |
Facts about Castle Airport (MER):
- Castle Airport (MER) currently has only 1 runway.
- It was estimated that the cost to relocate the 129 RQW to Castle, to include associated military construction costs, could be recouped in seven years.
- The closest airport to Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
- In 2004, recommendations were made to relocate the 129th Rescue Wing of the California Air National Guard and its associated HC-130, MC-130 and HH-60 aircraft from Moffett Federal Airfield to the former Castle Air Force Base, now Castle Airport.
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
- The airport is located at the former Castle Air Force Base which closed in 1995.
- Because of Castle Airport's relatively low elevation of 191 feet, planes can take off or land at Castle Airport 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 EPA currently has this base listed on their database due to the bulk wastes such as solvents, oils, fuels, and sludges which were disposed in pits at landfills around the base until 1977.
Facts about Bert Mooney Airport (BTM):
- 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 closest airport to Bert Mooney Airport (BTM) is Dillon Airport (DLN), which is located 48 miles (78 kilometers) S of BTM.
- 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 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.
- 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.