Nonstop flight route between Metlakatla, Annette Island, Alaska, United States and Lockhart River, Queensland, Australia:
Departure Airport:

Arrival Airport:

Distance from MTM to IRG:
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- About this route
- MTM Airport Information
- IRG Airport Information
- Facts about MTM
- Facts about IRG
- Map of Nearest Airports to MTM
- List of Nearest Airports to MTM
- Map of Furthest Airports from MTM
- List of Furthest Airports from MTM
- Map of Nearest Airports to IRG
- List of Nearest Airports to IRG
- Map of Furthest Airports from IRG
- List of Furthest Airports from IRG
About this route:
A direct, nonstop flight between Metlakatla Seaplane Base (MTM), Metlakatla, Annette Island, Alaska, United States and Lockhart River Airport (IRG), Lockhart River, Queensland, Australia would travel a Great Circle distance of 6,751 miles (or 10,865 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 Metlakatla Seaplane Base and Lockhart River 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 Metlakatla Seaplane Base and Lockhart River Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | MTM / PAMM |
Airport Name: | Metlakatla Seaplane Base |
Location: | Metlakatla, Annette Island, Alaska, United States |
GPS Coordinates: | 55°7'51"N by 131°34'41"W |
Area Served: | Metlakatla, Alaska |
Operator/Owner: | Alaska DOT&PF - Southeast Region |
Airport Type: | Public |
Elevation: | 0 feet (0 meters) |
# of Runways: | 2 |
View all routes: | Routes from MTM |
More Information: | MTM Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | IRG / YLHR |
Airport Name: | Lockhart River Airport |
Location: | Lockhart River, Queensland, Australia |
GPS Coordinates: | 12°47'12"S by 143°18'16"E |
Operator/Owner: | Lockhart River Aerodrome Company Pty Ltd |
Airport Type: | Public |
Elevation: | 77 feet (23 meters) |
# of Runways: | 1 |
View all routes: | Routes from IRG |
More Information: | IRG Maps & Info |
Facts about Metlakatla Seaplane Base (MTM):
- The furthest airport from Metlakatla Seaplane Base (MTM) is Port Alfred Airport (AFD), which is located 10,621 miles (17,093 kilometers) away in Port Alfred, South Africa.
- Metlakatla Seaplane Base has two seaplane landing areas designated E/W and N/S, each measuring 5,000 by 5,000 feet.
- Metlakatla Seaplane Base (MTM) has 2 runways.
- Because of Metlakatla Seaplane Base's relatively low elevation of 0 feet, planes can take off or land at Metlakatla Seaplane Base 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 Metlakatla Seaplane Base (MTM) is Annette Island Airport (ANN), which is located only 6 miles (10 kilometers) S of MTM.
Facts about Lockhart River Airport (IRG):
- The closest airport to Lockhart River Airport (IRG) is Coen Airport (CUQ), which is located 69 miles (110 kilometers) S of IRG.
- In addition, the 479th Service Squadron provided supplies for the B-26 and B-17s assigned to the airport, as well as operating a repair and maintenance depot for B-24 Liberator aircraft.
- Lockhart River Airport (IRG) currently has only 1 runway.
- The furthest airport from Lockhart River Airport (IRG) is Cesária Évora International Airport (VXE), which is located 11,611 miles (18,686 kilometers) away in São Vicente, Cape Verde.
- Because of Lockhart River Airport's relatively low elevation of 77 feet, planes can take off or land at Lockhart River 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 was constructed during World War II, and was used as a bomber and communications base for many years.