The opposite side of the world from Halifax (YHZ)
Halifax / Stanfield International Airport — 44.88°N, 63.51°W
Exact antipodal point
44.88°S, 116.49°E
Nearest airport to that point
Albany, Australia ALH
Albany Airport
The exact point falls in open water or empty terrain: the nearest airport is 1,111 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
94.4%
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.