Onchan is geographically located at latitude 54° 11' 23" North of the Equator and longitude 4° 27' 0" West of the Prime Meridian on the Map of World. The following locations related to it are represented by the shortest distances between two points on Earth and may not be nearest by road.

Queens Hotel, Dundee is about 300.4km, The Trout Inn, Oxford (England) is about 440.7km. These are places to stay (hotel, service apartment, inn) located near Onchan.

Hardknott Pass (England) is about 141.9km, Bidston Hill (England) is about 176.6km, Dumgoyne Ascent (Scotland) is about 204.1km, Dumgoyne (Scotland) is about 204.1km, Bettystown Beach (Meath) is about 206.8km. These are parks, playgrounds, open fields or commons located near Onchan.