| Ross on Wye to Oberkirch | 525.67 mi (845.98 km) |
| Ross on Wye to Obernburg am Main | 530.36 mi (853.53 km) |
| Ross on Wye to Obernkirchen | 496.95 mi (799.76 km) |
| Ross on Wye to Oberschleissheim | 675.27 mi (1,086.74 km) |
| Ross on Wye to Oberstdorf | 652.90 mi (1,050.75 km) |
| Ross on Wye to Obertraubling | 679.06 mi (1,092.84 km) |
| Ross on Wye to Obertshausen | 512.22 mi (824.34 km) |
| Ross on Wye to Oberursel | 498.46 mi (802.20 km) |
| Ross on Wye to Ochsenfurt | 573.65 mi (923.21 km) |
| Ross on Wye to Ochsenhausen | 615.74 mi (990.95 km) |
| Ross on Wye to Ochtrup | 415.52 mi (668.72 km) |
| Ross on Wye to Odenthal | 421.70 mi (678.66 km) |
| Ross on Wye to Oelde | 457.64 mi (736.50 km) |
| Ross on Wye to Oelsnitz | 646.39 mi (1,040.26 km) |
| Ross on Wye to Oer-Erkenschwick | 420.65 mi (676.97 km) |
