The opposite side of the world from Chennai (MAA)
Chennai International Airport — 12.99°N, 80.17°E
Exact antipodal point
12.99°S, 99.83°W
Nearest airport to that point
Isla Baltra, Ecuador GPS
Seymour Galapagos Ecological Airport
The exact point falls in open water or empty terrain: the nearest airport is 1,748 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
91.3%
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.