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

Arrival Airport:

Distance from SPA to MER:
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- About this route
- SPA Airport Information
- MER Airport Information
- Facts about SPA
- Facts about MER
- Map of Nearest Airports to SPA
- List of Nearest Airports to SPA
- Map of Furthest Airports from SPA
- List of Furthest Airports from SPA
- 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 Spartanburg Downtown Memorial Airport (SPA), Spartanburg, South Carolina, United States and Castle Airport (MER), Atwater, California, United States would travel a Great Circle distance of 2,146 miles (or 3,454 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 Spartanburg Downtown Memorial Airport and Castle Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | SPA / KSPA |
Airport Name: | Spartanburg Downtown Memorial Airport |
Location: | Spartanburg, South Carolina, United States |
GPS Coordinates: | 34°54'56"N by 81°57'23"W |
Airport Type: | Public |
Elevation: | 801 feet (244 meters) |
# of Runways: | 1 |
View all routes: | Routes from SPA |
More Information: | SPA 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 Spartanburg Downtown Memorial Airport (SPA):
- The airport once had three intersecting runways with a parallel taxiway system that connected them to the aircraft parking apron.
- The closest airport to Spartanburg Downtown Memorial Airport (SPA) is Greenville–Spartanburg International Airport (GSP), which is located only 15 miles (24 kilometers) W of SPA.
- Because of Spartanburg Downtown Memorial Airport's relatively low elevation of 801 feet, planes can take off or land at Spartanburg Downtown Memorial 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 furthest airport from Spartanburg Downtown Memorial Airport (SPA) is Margaret River Airport (MGV), which is located 11,463 miles (18,449 kilometers) away in Margaret River, Western Australia, Australia.
- Spartanburg Downtown Memorial Airport (SPA) currently has only 1 runway.
- The airport is home to the Spartanburg Composite Squadron of the Civil Air Patrol and to the Spartanburg Pilot's Association
Facts about Castle Airport (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 closest airport to Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
- 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.
- 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.
- 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 furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
- Castle Air Museum is 500 yards away, displaying over 50 restored World War II, Korean War, and Cold War era aircraft.
- It serves one school, Sierra Academy of Aeronautics, which specializes in training foreign pilots, from the People's Republic of China.