| Colwyn Bay to Oerlinghausen | 525.94 mi (846.42 km) |
| Colwyn Bay to Oestrich-Winkel | 549.88 mi (884.95 km) |
| Colwyn Bay to Offenburg | 605.72 mi (974.82 km) |
| Colwyn Bay to Oftersheim | 594.41 mi (956.61 km) |
| Colwyn Bay to Ohrdruf | 635.05 mi (1,022.01 km) |
| Colwyn Bay to Ohringen | 635.73 mi (1,023.11 km) |
| Colwyn Bay to Olbernhau | 745.26 mi (1,199.37 km) |
| Colwyn Bay to Olching | 742.75 mi (1,195.35 km) |
| Colwyn Bay to Oldenburg | 492.44 mi (792.50 km) |
| Colwyn Bay to Oldenburg in Holstein | 598.16 mi (962.64 km) |
| Colwyn Bay to Olfen | 478.12 mi (769.46 km) |
| Colwyn Bay to Olpe | 512.86 mi (825.37 km) |
| Colwyn Bay to Olsberg | 530.98 mi (854.53 km) |
| Colwyn Bay to Oranienburg | 703.22 mi (1,131.72 km) |
| Colwyn Bay to Ortenberg | 580.25 mi (933.83 km) |
