| Round Rock to Oswaldtwistle | 4,748.67 mi (7,642.24 km) |
| Round Rock to Oswestry | 4,747.31 mi (7,640.06 km) |
| Round Rock to Otley | 4,770.71 mi (7,677.72 km) |
| Round Rock to Ovenden | 4,768.01 mi (7,673.37 km) |
| Round Rock to Oxford | 4,847.54 mi (7,801.35 km) |
| Round Rock to Oxted | 4,910.78 mi (7,903.13 km) |
| Round Rock to Padbury | 4,853.11 mi (7,810.33 km) |
| Round Rock to Padiham | 4,750.29 mi (7,644.85 km) |
| Round Rock to Paignton | 4,793.00 mi (7,713.58 km) |
| Round Rock to Paisley | 4,619.48 mi (7,434.33 km) |
| Round Rock to Palmers Green | 4,896.06 mi (7,879.45 km) |
| Round Rock to Parkstone | 4,850.03 mi (7,805.37 km) |
| Round Rock to Partick | 4,622.92 mi (7,439.87 km) |
| Round Rock to Patcham | 4,916.84 mi (7,912.88 km) |
| Round Rock to Peebles | 4,669.09 mi (7,514.17 km) |
