Nonstop flight route between Atwater, California, United States and Greenville / Spartanburg, South Carolina, United States:
Departure Airport:

Arrival Airport:

Distance from MER to GSP:
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- About this route
- MER Airport Information
- GSP Airport Information
- Facts about MER
- Facts about GSP
- 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 GSP
- List of Nearest Airports to GSP
- Map of Furthest Airports from GSP
- List of Furthest Airports from GSP
About this route:
A direct, nonstop flight between Castle Airport (MER), Atwater, California, United States and Greenville–Spartanburg International Airport (GSP), Greenville / Spartanburg, South Carolina, United States would travel a Great Circle distance of 2,132 miles (or 3,431 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 Greenville–Spartanburg International 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: | GSP / KGSP |
Airport Names: |
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Location: | Greenville / Spartanburg, South Carolina, United States |
GPS Coordinates: | 34°53'44"N by 82°13'8"W |
Area Served: | Upstate South Carolina |
Operator/Owner: | Greenville–Spartanburg Airport District |
Airport Type: | Public |
Elevation: | 964 feet (294 meters) |
# of Runways: | 1 |
View all routes: | Routes from GSP |
More Information: | GSP Maps & Info |
Facts about Castle Airport (MER):
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
- EPA investigations have been completed at multiple areas of contamination including landfills, discharge areas, chemical disposal areas, fire training areas, fuel spill areas, and polychlorinated biphenyl spill areas.
- Castle Air Museum is 500 yards away, displaying over 50 restored World War II, Korean War, and Cold War era aircraft.
- 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.
- 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.
- The airport is located at the former Castle Air Force Base which closed in 1995.
- 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.
Facts about Greenville–Spartanburg International Airport (GSP):
- The furthest airport from Greenville–Spartanburg International Airport (GSP) is Margaret River Airport (MGV), which is located 11,449 miles (18,425 kilometers) away in Margaret River, Western Australia, Australia.
- Greenville–Spartanburg International Airport is near Greer, South Carolina, midway between Greenville and Spartanburg, the major cities of the Upstate region.
- FedEx operates a major package facility on the north end of the airport, and BMW has a facility which allows for the importation of parts to be easily accessed to the company's manufacturing facility, three miles to the east.
- Because of Greenville–Spartanburg International Airport's relatively low elevation of 964 feet, planes can take off or land at Greenville–Spartanburg International 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.
- In addition to being known as "Greenville–Spartanburg International Airport", another name for GSP is "Roger Milliken Field".
- Greenville–Spartanburg International Airport handled 1,856,316 passengers last year.
- GSP has six airlines and their regional affiliates.
- The closest airport to Greenville–Spartanburg International Airport (GSP) is Greenville Downtown Airport (GMU), which is located only 8 miles (13 kilometers) WSW of GSP.
- Greenville–Spartanburg International Airport (GSP) currently has only 1 runway.