The opposite side of the world from Sanya (Tianya) (SYX)
Sanya Phoenix International Airport — 18.30°N, 109.41°E
Exact antipodal point
18.30°S, 70.59°W
Nearest airport to that point
Arica, Chile ARI
Chacalluta International Airport
This is a genuinely close pairing — the airport sits just 27 km from the exact antipodal point.
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Of the maximum possible
99.9%
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.