The opposite side of the world from San José (Alajuela) (SJO)
Juan Santamaría International Airport — 9.99°N, 84.21°W
Exact antipodal point
9.99°S, 95.79°E
Nearest airport to that point
West Island, Cocos (Keeling) Islands CCK
Cocos (Keeling) Islands Airport
This is a genuinely close pairing — the airport sits just 270 km from the exact antipodal point.
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Of the maximum possible
98.7%
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.