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

Arrival Airport:

Distance from UAM to MER:
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- About this route
- UAM Airport Information
- MER Airport Information
- Facts about UAM
- Facts about 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
- Map of Nearest Airports to MER
- List of Nearest Airports to MER
- Map of Furthest Airports from MER
- List of Furthest Airports from MER
About this route:
A direct, nonstop flight between Andersen Air Force Base (UAM), Agana, Guam and Castle Airport (MER), Atwater, California, United States 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 Andersen Air Force Base and Castle 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 Andersen Air Force Base and Castle Airport. You'll see that it will travel the same route of the red line on this map!
Departure 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 |
Arrival 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 |
Facts about Andersen Air Force Base (UAM):
- The host unit at Andersen AFB is the 36th Wing, assigned to the Pacific Air Forces Thirteenth Air Force.
- After the end of World War II, Guam served as a collection point for surplus war goods that had accumulated in the Pacific Theater.
- 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.
- Andersen Air Force Base was established on 3 December 1944 and is named for Brigadier General James Roy Andersen.
- With the start of Operation Arc Light in June 1965, B-52s and KC-135s began regular bombing missions over Vietnam, and continued in that capacity until 1973, with a break between August 1970 and early 1972.
- In 1951, the Strategic Air Command chose several overseas bases to support rotational unit deployments of its bombers from stateside bases, starting with B-29 Superfortress units and later including Convair B-36, B-47 Stratojet, B-50 Superfortress bombers, and KB-29 refueling tankers.
- 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.
Facts about Castle Airport (MER):
- Castle Airport (MER) currently has only 1 runway.
- The closest airport to Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
- 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 airport is located at the former Castle Air Force Base which closed in 1995.
- 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.
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.