The opposite side of the world from Port Moresby (POM)
Port Moresby Jacksons International Airport — 9.44°S, 147.22°E
Exact antipodal point
9.44°N, 32.78°W
Nearest airport to that point
São Pedro, Cape Verde VXE
Cesaria Evora International Airport
The exact point falls in open water or empty terrain: the nearest airport is 1,172 km away from it. Roughly 71% of the Earth is ocean, so most antipodes land at sea.
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Of the maximum possible
94.1%
No two points on Earth can be more than about 20,015 km apart.
The antipode is found by negating the latitude and shifting the longitude by 180°. Distances use the haversine formula on a sphere of mean radius 6,371.0088 km. Airport coordinates come from the public-domain OurAirports dataset.