The opposite side of the world from Monterrey (MTY)
Monterrey International Airport — 25.78°N, 100.11°W
Exact antipodal point
25.78°S, 79.89°E
Nearest airport to that point
Port Mathurin, Mauritius RRG
Sir Charles Gaetan Duval Airport
The exact point falls in open water or empty terrain: the nearest airport is 1,821 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
90.9%
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.