The opposite side of the world from Nuku'alofa (TBU)
Fua'amotu International Airport — 21.24°S, 175.15°W
Exact antipodal point
21.24°N, 4.85°E
Nearest airport to that point
Tamanrasset, Algeria TMR
Aguenar – Hadj Bey Akhamok Airport
This is a genuinely close pairing — the airport sits just 185 km from the exact antipodal point.
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Of the maximum possible
99.1%
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.