| Ross on Wye to Oerlinghausen | 478.88 mi (770.69 km) |
| Ross on Wye to Oestrich-Winkel | 478.88 mi (770.68 km) |
| Ross on Wye to Offenburg | 522.11 mi (840.26 km) |
| Ross on Wye to Oftersheim | 519.45 mi (835.97 km) |
| Ross on Wye to Ohrdruf | 578.57 mi (931.12 km) |
| Ross on Wye to Ohringen | 561.92 mi (904.33 km) |
| Ross on Wye to Olbernhau | 691.86 mi (1,113.45 km) |
| Ross on Wye to Olching | 666.67 mi (1,072.90 km) |
| Ross on Wye to Oldenburg | 461.42 mi (742.58 km) |
| Ross on Wye to Oldenburg in Holstein | 581.50 mi (935.84 km) |
| Ross on Wye to Olfen | 425.75 mi (685.18 km) |
| Ross on Wye to Olpe | 452.40 mi (728.06 km) |
| Ross on Wye to Olsberg | 475.90 mi (765.89 km) |
| Ross on Wye to Oranienburg | 669.24 mi (1,077.03 km) |
| Ross on Wye to Ortenberg | 515.51 mi (829.63 km) |
