| Vallendar to Oberkirch | 130.43 mi (209.91 km) |
| Vallendar to Obernburg am Main | 77.54 mi (124.79 km) |
| Vallendar to Obernkirchen | 144.39 mi (232.38 km) |
| Vallendar to Oberschleissheim | 231.39 mi (372.38 km) |
| Vallendar to Oberstdorf | 239.06 mi (384.74 km) |
| Vallendar to Obertraubling | 225.92 mi (363.58 km) |
| Vallendar to Obertshausen | 58.20 mi (93.66 km) |
| Vallendar to Oberursel | 44.22 mi (71.16 km) |
| Vallendar to Ochsenfurt | 120.16 mi (193.39 km) |
| Vallendar to Ochsenhausen | 191.85 mi (308.76 km) |
| Vallendar to Ochtrup | 126.34 mi (203.32 km) |
| Vallendar to Odenthal | 49.20 mi (79.18 km) |
| Vallendar to Oelde | 101.84 mi (163.89 km) |
| Vallendar to Oelsnitz | 200.10 mi (322.03 km) |
| Vallendar to Oer-Erkenschwick | 87.53 mi (140.86 km) |
