| River Ridge to Oswaldtwistle | 4,493.26 mi (7,231.20 km) |
| River Ridge to Oswestry | 4,485.25 mi (7,218.31 km) |
| River Ridge to Otley | 4,517.36 mi (7,269.99 km) |
| River Ridge to Ovenden | 4,513.33 mi (7,263.51 km) |
| River Ridge to Oxford | 4,581.10 mi (7,372.57 km) |
| River Ridge to Oxted | 4,643.25 mi (7,472.59 km) |
| River Ridge to Padbury | 4,588.52 mi (7,384.51 km) |
| River Ridge to Padiham | 4,495.35 mi (7,234.56 km) |
| River Ridge to Paignton | 4,514.91 mi (7,266.05 km) |
| River Ridge to Paisley | 4,375.42 mi (7,041.56 km) |
| River Ridge to Palmers Green | 4,630.59 mi (7,452.22 km) |
| River Ridge to Parkstone | 4,576.08 mi (7,364.48 km) |
| River Ridge to Partick | 4,379.17 mi (7,047.59 km) |
| River Ridge to Patcham | 4,646.67 mi (7,478.09 km) |
| River Ridge to Peebles | 4,425.27 mi (7,121.79 km) |
