| Ascoli Piceno to Oberkirch | 473.70 mi (762.34 km) |
| Ascoli Piceno to Obernburg am Main | 527.15 mi (848.37 km) |
| Ascoli Piceno to Obernkirchen | 682.78 mi (1,098.83 km) |
| Ascoli Piceno to Oberschleissheim | 385.61 mi (620.58 km) |
| Ascoli Piceno to Oberstdorf | 353.74 mi (569.30 km) |
| Ascoli Piceno to Obertraubling | 427.99 mi (688.78 km) |
| Ascoli Piceno to Obertshausen | 547.21 mi (880.64 km) |
| Ascoli Piceno to Oberursel | 560.72 mi (902.40 km) |
| Ascoli Piceno to Ochsenfurt | 498.83 mi (802.78 km) |
| Ascoli Piceno to Ochsenhausen | 401.41 mi (646.01 km) |
| Ascoli Piceno to Ochtrup | 711.23 mi (1,144.61 km) |
| Ascoli Piceno to Odenthal | 641.86 mi (1,032.98 km) |
| Ascoli Piceno to Oelde | 670.32 mi (1,078.78 km) |
| Ascoli Piceno to Oelsnitz | 527.08 mi (848.26 km) |
| Ascoli Piceno to Oer-Erkenschwick | 675.59 mi (1,087.26 km) |
