| Vallendar to Oerlinghausen | 117.51 mi (189.11 km) |
| Vallendar to Oestrich-Winkel | 32.13 mi (51.71 km) |
| Vallendar to Offenburg | 134.11 mi (215.83 km) |
| Vallendar to Oftersheim | 82.87 mi (133.36 km) |
| Vallendar to Ohrdruf | 139.59 mi (224.65 km) |
| Vallendar to Ohringen | 117.70 mi (189.43 km) |
| Vallendar to Olbernhau | 251.46 mi (404.69 km) |
| Vallendar to Olching | 225.24 mi (362.50 km) |
| Vallendar to Oldenburg | 191.46 mi (308.13 km) |
| Vallendar to Oldenburg in Holstein | 302.68 mi (487.12 km) |
| Vallendar to Olfen | 91.76 mi (147.68 km) |
| Vallendar to Olpe | 43.80 mi (70.48 km) |
| Vallendar to Olsberg | 75.79 mi (121.98 km) |
| Vallendar to Oranienburg | 290.83 mi (468.05 km) |
| Vallendar to Ortenberg | 63.22 mi (101.74 km) |
