Nonstop flight route between Greensboro, North Carolina, United States and Atwater, California, United States:
Departure Airport:

Arrival Airport:

Distance from GSO to MER:
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- About this route
- GSO Airport Information
- MER Airport Information
- Facts about GSO
- Facts about MER
- Map of Nearest Airports to GSO
- List of Nearest Airports to GSO
- Map of Furthest Airports from GSO
- List of Furthest Airports from GSO
- 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 Piedmont Triad International Airport (GSO), Greensboro, North Carolina, United States and Castle Airport (MER), Atwater, California, United States would travel a Great Circle distance of 2,234 miles (or 3,595 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 Piedmont Triad International 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: | GSO / KGSO |
Airport Name: | Piedmont Triad International Airport |
Location: | Greensboro, North Carolina, United States |
GPS Coordinates: | 36°5'52"N by 79°56'13"W |
Area Served: | Greensboro, High Point, and Winston-Salem, North Carolina |
Operator/Owner: | Piedmont Triad Airport Authority |
Airport Type: | Public |
Elevation: | 926 feet (282 meters) |
# of Runways: | 3 |
View all routes: | Routes from GSO |
More Information: | GSO 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 Piedmont Triad International Airport (GSO):
- Because of Piedmont Triad International Airport's relatively low elevation of 926 feet, planes can take off or land at Piedmont Triad 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 December 2008, FedEx Express said that it would open the hub on time in June 2009, but it will operate at nowhere near capacity.
- Also in the mid-1990s, start-up carrier Eastwind Airlines began serving PTI.
- The closest airport to Piedmont Triad International Airport (GSO) is Smith Reynolds Airport (INT), which is located only 16 miles (26 kilometers) W of GSO.
- The furthest airport from Piedmont Triad International Airport (GSO) is Margaret River Airport (MGV), which is located 11,574 miles (18,626 kilometers) away in Margaret River, Western Australia, Australia.
- Piedmont Triad International Airport (GSO) has 3 runways.
- An antecedent of PTI Airport, one of the first commercial airports in the South, Maynard Field was dedicated on December 6, 1919, just west of Greensboro near Oak Ridge.
- Pitcairn Aviation, Incorporated was given the contract to fly the airmail route, the second official airmail route in the United States, and Pitcairn Aviation made the first delivery of airmail in North Carolina on May 1, 1928.
Facts about Castle Airport (MER):
- Castle Airport (MER) currently has only 1 runway.
- The airport is located at the former Castle Air Force Base which closed in 1995.
- 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.
- Castle Air Museum is 500 yards away, displaying over 50 restored World War II, Korean War, and Cold War era aircraft.
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
- 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.
- 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.