| Castle Rock to Oswaldtwistle | 4,533.27 mi (7,295.59 km) |
| Castle Rock to Oswestry | 4,544.75 mi (7,314.07 km) |
| Castle Rock to Otley | 4,550.78 mi (7,323.77 km) |
| Castle Rock to Ovenden | 4,550.67 mi (7,323.59 km) |
| Castle Rock to Oxford | 4,650.70 mi (7,484.58 km) |
| Castle Rock to Oxted | 4,714.36 mi (7,587.03 km) |
| Castle Rock to Padbury | 4,652.52 mi (7,487.51 km) |
| Castle Rock to Padiham | 4,533.95 mi (7,296.69 km) |
| Castle Rock to Paignton | 4,620.91 mi (7,436.63 km) |
| Castle Rock to Paisley | 4,386.40 mi (7,059.22 km) |
| Castle Rock to Palmers Green | 4,696.01 mi (7,557.49 km) |
| Castle Rock to Parkstone | 4,668.04 mi (7,512.48 km) |
| Castle Rock to Partick | 4,389.18 mi (7,063.70 km) |
| Castle Rock to Patcham | 4,725.46 mi (7,604.90 km) |
| Castle Rock to Peebles | 4,434.14 mi (7,136.06 km) |
