| Conwy to Oberkirch | 612.81 mi (986.23 km) |
| Conwy to Obernburg am Main | 604.65 mi (973.08 km) |
| Conwy to Obernkirchen | 544.96 mi (877.02 km) |
| Conwy to Oberschleissheim | 755.18 mi (1,215.34 km) |
| Conwy to Oberstdorf | 740.65 mi (1,191.96 km) |
| Conwy to Obertraubling | 752.96 mi (1,211.77 km) |
| Conwy to Obertshausen | 585.25 mi (941.87 km) |
| Conwy to Oberursel | 570.85 mi (918.70 km) |
| Conwy to Ochsenfurt | 647.27 mi (1,041.69 km) |
| Conwy to Ochsenhausen | 700.70 mi (1,127.68 km) |
| Conwy to Ochtrup | 466.42 mi (750.63 km) |
| Conwy to Odenthal | 488.71 mi (786.50 km) |
| Conwy to Oelde | 512.43 mi (824.67 km) |
| Conwy to Oelsnitz | 709.14 mi (1,141.24 km) |
| Conwy to Oer-Erkenschwick | 479.48 mi (771.64 km) |
