| Aberdare to Oberkirch | 555.15 mi (893.43 km) |
| Aberdare to Obernburg am Main | 564.16 mi (907.92 km) |
| Aberdare to Obernkirchen | 535.21 mi (861.34 km) |
| Aberdare to Oberschleissheim | 707.02 mi (1,137.84 km) |
| Aberdare to Oberstdorf | 681.73 mi (1,097.13 km) |
| Aberdare to Obertraubling | 712.58 mi (1,146.79 km) |
| Aberdare to Obertshausen | 546.40 mi (879.35 km) |
| Aberdare to Oberursel | 532.85 mi (857.54 km) |
| Aberdare to Ochsenfurt | 607.50 mi (977.68 km) |
| Aberdare to Ochsenhausen | 645.83 mi (1,039.36 km) |
| Aberdare to Ochtrup | 453.68 mi (730.13 km) |
| Aberdare to Odenthal | 457.55 mi (736.35 km) |
| Aberdare to Oelde | 495.27 mi (797.06 km) |
| Aberdare to Oelsnitz | 682.43 mi (1,098.26 km) |
| Aberdare to Oer-Erkenschwick | 457.86 mi (736.86 km) |
