The opposite side of the world from Sydney (Mascot) (SYD)
Sydney Kingsford Smith International Airport — 33.95°S, 151.18°E
Exact antipodal point
33.95°N, 28.82°W
Nearest airport to that point
Vila do Porto, Portugal SMA
Santa Maria Airport
This is a genuinely close pairing — the airport sits just 472 km from the exact antipodal point.
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Of the maximum possible
97.6%
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.