| Potenza Picena to Oberkirch | 444.82 mi (715.87 km) |
| Potenza Picena to Obernburg am Main | 494.93 mi (796.51 km) |
| Potenza Picena to Obernkirchen | 649.05 mi (1,044.54 km) |
| Potenza Picena to Oberschleissheim | 351.52 mi (565.71 km) |
| Potenza Picena to Oberstdorf | 322.82 mi (519.53 km) |
| Potenza Picena to Obertraubling | 393.01 mi (632.49 km) |
| Potenza Picena to Obertshausen | 515.14 mi (829.04 km) |
| Potenza Picena to Oberursel | 528.83 mi (851.07 km) |
| Potenza Picena to Ochsenfurt | 465.66 mi (749.41 km) |
| Potenza Picena to Ochsenhausen | 370.06 mi (595.55 km) |
| Potenza Picena to Ochtrup | 679.04 mi (1,092.81 km) |
| Potenza Picena to Odenthal | 610.76 mi (982.92 km) |
| Potenza Picena to Oelde | 637.58 mi (1,026.08 km) |
| Potenza Picena to Oelsnitz | 491.87 mi (791.59 km) |
| Potenza Picena to Oer-Erkenschwick | 643.79 mi (1,036.08 km) |
