| Wealdstone to Oerlinghausen | 385.40 mi (620.24 km) |
| Wealdstone to Oestrich-Winkel | 380.09 mi (611.70 km) |
| Wealdstone to Offenburg | 425.56 mi (684.88 km) |
| Wealdstone to Oftersheim | 420.87 mi (677.33 km) |
| Wealdstone to Ohrdruf | 481.51 mi (774.92 km) |
| Wealdstone to Ohringen | 463.27 mi (745.57 km) |
| Wealdstone to Olbernhau | 595.23 mi (957.93 km) |
| Wealdstone to Olching | 568.35 mi (914.67 km) |
| Wealdstone to Oldenburg | 375.92 mi (604.98 km) |
| Wealdstone to Oldenburg in Holstein | 502.34 mi (808.44 km) |
| Wealdstone to Olfen | 330.80 mi (532.37 km) |
| Wealdstone to Olpe | 354.90 mi (571.16 km) |
| Wealdstone to Olsberg | 379.67 mi (611.02 km) |
| Wealdstone to Oranienburg | 579.73 mi (932.98 km) |
| Wealdstone to Ortenberg | 417.10 mi (671.26 km) |
