The opposite side of the world from Santiago (SCL)
Comodoro Arturo Merino Benítez International Airport — 33.39°S, 70.79°W
Exact antipodal point
33.39°N, 109.21°E
Nearest airport to that point
Xi'an, China XIY
Xi'an Xianyang International Airport
This is a genuinely close pairing — the airport sits just 124 km from the exact antipodal point.
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Of the maximum possible
99.4%
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.