Nonstop flight route between Atwater, California, United States and Agana, Guam:
Departure Airport:

Arrival Airport:

Distance from MER to UAM:
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- About this route
- MER Airport Information
- UAM Airport Information
- Facts about MER
- Facts about UAM
- 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 UAM
- List of Nearest Airports to UAM
- Map of Furthest Airports from UAM
- List of Furthest Airports from UAM
About this route:
A direct, nonstop flight between Castle Airport (MER), Atwater, California, United States and Andersen Air Force Base (UAM), Agana, Guam would travel a Great Circle distance of 5,894 miles (or 9,485 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 Castle Airport and Andersen Air Force Base, 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 Castle Airport and Andersen Air Force Base. You'll see that it will travel the same route of the red line on this map!
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: | UAM / PGUA |
Airport Name: | Andersen Air Force Base |
Location: | Agana, Guam |
GPS Coordinates: | 13°34'51"N by 144°55'27"E |
View all routes: | Routes from UAM |
More Information: | UAM Maps & Info |
Facts about Castle Airport (MER):
- The closest airport to Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
- Castle Airport (MER) currently has only 1 runway.
- 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.
- 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.
- Since the mid-1940s, aircraft maintenance, fuel management, and fire training activities on the base have generated wastes that consist primarily of waste fuels, oils, solvents, and cleaners.
- Castle Airport is a public use airport located seven nautical miles northwest of the central business district of Merced, a city in Merced County, California, United States.
- With its central location in the San Joaquin Valley, on the route of the proposed California High-Speed Rail system, and with a large, underdeveloped site, Castle Airport has been submitted as a possible location for the central maintenance facility for the system.
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
Facts about Andersen Air Force Base (UAM):
- The closest airport to Andersen Air Force Base (UAM) is Guam International Airport (GUM), which is located only 11 miles (17 kilometers) SW of UAM.
- The host unit at Andersen AFB is the 36th Wing, assigned to the Pacific Air Forces Thirteenth Air Force.
- Andersen Air Force Base's origins begin on 7 December 1941 when Guam was attacked by the armed forces of Imperial Japan in the Battle of Guam three hours after the Attack on Pearl Harbor.
- The furthest airport from Andersen Air Force Base (UAM) is Salvador-Deputado Luís Eduardo Magalhães International Airport (2 de Julho) (SSA), which is nearly antipodal to Andersen Air Force Base (meaning Andersen Air Force Base is almost on the exact opposite side of the Earth from Salvador-Deputado Luís Eduardo Magalhães International Airport (2 de Julho)), and is located 12,214 miles (19,656 kilometers) away in Salvador, Bahia, Brazil.
- The frequent bombings resulted in a cease-fire in Vietnam, but the B-52s continued to fly missions over Cambodia and Laos until those were halted on 15 August 1973.
- The Strategic Air Command continued its 90-day unit rotational training program, and began to take over control over the base from the FEAF.
- At Andersen, the wing assumed responsibility for administering two active and one semi-active bases plus an assortment of communication, weather, radar, rescue and other facilities and units including the Marianas Air Material Area, a wing size unit.
- Guam was considered as being ideal to establish air bases to launch B-29 Superfortress operations against the Japanese Home Islands.