| Ponte San Pietro to Oberkirch | 208.29 mi (335.21 km) |
| Ponte San Pietro to Obernburg am Main | 286.95 mi (461.80 km) |
| Ponte San Pietro to Obernkirchen | 454.34 mi (731.20 km) |
| Ponte San Pietro to Oberschleissheim | 199.47 mi (321.02 km) |
| Ponte San Pietro to Oberstdorf | 122.75 mi (197.55 km) |
| Ponte San Pietro to Obertraubling | 256.02 mi (412.03 km) |
| Ponte San Pietro to Obertshausen | 303.88 mi (489.04 km) |
| Ponte San Pietro to Oberursel | 314.79 mi (506.60 km) |
| Ponte San Pietro to Ochsenfurt | 273.98 mi (440.92 km) |
| Ponte San Pietro to Ochsenhausen | 164.93 mi (265.43 km) |
| Ponte San Pietro to Ochtrup | 462.55 mi (744.40 km) |
| Ponte San Pietro to Odenthal | 385.65 mi (620.64 km) |
| Ponte San Pietro to Oelde | 428.93 mi (690.29 km) |
| Ponte San Pietro to Oelsnitz | 347.05 mi (558.53 km) |
| Ponte San Pietro to Oer-Erkenschwick | 424.28 mi (682.81 km) |
