The opposite side of the world from Hanoi (Soc Son) (HAN)
Noi Bai International Airport — 21.22°N, 105.81°E
Exact antipodal point
21.22°S, 74.19°W
Nearest airport to that point
Iquique, Chile IQQ
Diego Aracena International Airport
This is a genuinely close pairing — the airport sits just 424 km from the exact antipodal point.
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Of the maximum possible
97.9%
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.