| River Ridge to Norwich | 4,662.51 mi (7,503.58 km) |
| River Ridge to Nottingham | 4,558.79 mi (7,336.67 km) |
| River Ridge to Nuneaton | 4,555.59 mi (7,331.52 km) |
| River Ridge to Oadby | 4,569.52 mi (7,353.94 km) |
| River Ridge to Oakengates | 4,512.70 mi (7,262.48 km) |
| River Ridge to Oakham | 4,581.54 mi (7,373.28 km) |
| River Ridge to Oldbury | 4,534.10 mi (7,296.93 km) |
| River Ridge to Oldham | 4,508.15 mi (7,255.17 km) |
| River Ridge to Ollerton | 4,558.51 mi (7,336.21 km) |
| River Ridge to Olton | 4,543.96 mi (7,312.79 km) |
| River Ridge to Omagh | 4,286.81 mi (6,898.95 km) |
| River Ridge to Ormesby | 4,523.24 mi (7,279.45 km) |
| River Ridge to Ormskirk | 4,477.52 mi (7,205.87 km) |
| River Ridge to Orpington | 4,644.73 mi (7,474.97 km) |
| River Ridge to Ossett | 4,526.27 mi (7,284.32 km) |
