The opposite side of the world from Cartagena (CTG)
Rafael Nuñez International Airport — 10.44°N, 75.51°W
Exact antipodal point
10.44°S, 104.49°E
Nearest airport to that point
Flying Fish Cove, Christmas Island XCH
Christmas Island International Airport
This is a genuinely close pairing — the airport sits just 132 km from the exact antipodal point.
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Of the maximum possible
99.3%
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.