Nonstop flight route between Sand Island, Midway Atoll, United States and Greymouth, New Zealand:
Departure Airport:

Arrival Airport:

Distance from MDY to GMN:
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- About this route
- MDY Airport Information
- GMN Airport Information
- Facts about MDY
- Facts about GMN
- Map of Nearest Airports to MDY
- List of Nearest Airports to MDY
- Map of Furthest Airports from MDY
- List of Furthest Airports from MDY
- Map of Nearest Airports to GMN
- List of Nearest Airports to GMN
- Map of Furthest Airports from GMN
- List of Furthest Airports from GMN
About this route:
A direct, nonstop flight between Henderson Field (MDY), Sand Island, Midway Atoll, United States and Greymouth Airport (GMN), Greymouth, New Zealand would travel a Great Circle distance of 4,936 miles (or 7,944 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 Henderson Field and Greymouth 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 Henderson Field and Greymouth Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | MDY / PMDY |
Airport Name: | Henderson Field |
Location: | Sand Island, Midway Atoll, United States |
GPS Coordinates: | 28°12'5"N by 177°22'53"W |
Area Served: | Midway Atoll |
Operator/Owner: | U.S. Dept. of the Interior Fish and Wildlife Service |
Airport Type: | Public |
Elevation: | 18 feet (5 meters) |
# of Runways: | 1 |
View all routes: | Routes from MDY |
More Information: | MDY Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | GMN / NZGM |
Airport Name: | Greymouth Airport |
Location: | Greymouth, New Zealand |
GPS Coordinates: | 42°27'42"S by 171°11'23"E |
Operator/Owner: | Grey District Council |
Airport Type: | Public |
Elevation: | 14 feet (4 meters) |
# of Runways: | 1 |
View all routes: | Routes from GMN |
More Information: | GMN Maps & Info |
Facts about Henderson Field (MDY):
- Because of Henderson Field's relatively low elevation of 18 feet, planes can take off or land at Henderson Field 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 closest airport to Henderson Field (MDY) is Johnston Atoll Airport (JON), which is located 937 miles (1,508 kilometers) SE of MDY.
- After transition from the U.S.
- Henderson Field (MDY) currently has only 1 runway.
- The furthest airport from Henderson Field (MDY) is Lüderitz Airport (LUD), which is located 11,656 miles (18,759 kilometers) away in Luderitz, Namibia.
Facts about Greymouth Airport (GMN):
- The furthest airport from Greymouth Airport (GMN) is Vigo Airport (VGO), which is nearly antipodal to Greymouth Airport (meaning Greymouth Airport is almost on the exact opposite side of the Earth from Vigo Airport), and is located 12,418 miles (19,985 kilometers) away in Vigo, Galicia, Spain.
- The closest airport to Greymouth Airport (GMN) is Hokitika Airport (HKK), which is located 20 miles (33 kilometers) SSW of GMN.
- Greymouth Airport (GMN) currently has only 1 runway.
- Because of Greymouth Airport's relatively low elevation of 14 feet, planes can take off or land at Greymouth 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.