| Castagneto Carducci to Oberkirch | 390.02 mi (627.67 km) |
| Castagneto Carducci to Obernburg am Main | 466.24 mi (750.35 km) |
| Castagneto Carducci to Obernkirchen | 632.46 mi (1,017.84 km) |
| Castagneto Carducci to Oberschleissheim | 354.30 mi (570.19 km) |
| Castagneto Carducci to Oberstdorf | 293.58 mi (472.47 km) |
| Castagneto Carducci to Obertraubling | 407.63 mi (656.02 km) |
| Castagneto Carducci to Obertshausen | 484.02 mi (778.96 km) |
| Castagneto Carducci to Oberursel | 495.50 mi (797.43 km) |
| Castagneto Carducci to Ochsenfurt | 448.67 mi (722.06 km) |
| Castagneto Carducci to Ochsenhausen | 340.39 mi (547.81 km) |
| Castagneto Carducci to Ochtrup | 644.16 mi (1,036.67 km) |
| Castagneto Carducci to Odenthal | 567.51 mi (913.32 km) |
| Castagneto Carducci to Oelde | 609.53 mi (980.95 km) |
| Castagneto Carducci to Oelsnitz | 506.35 mi (814.89 km) |
| Castagneto Carducci to Oer-Erkenschwick | 606.01 mi (975.28 km) |
