| Castelfranco Emilia to Oberkirch | 306.34 mi (493.00 km) |
| Castelfranco Emilia to Obernburg am Main | 373.18 mi (600.58 km) |
| Castelfranco Emilia to Obernkirchen | 537.25 mi (864.61 km) |
| Castelfranco Emilia to Oberschleissheim | 253.60 mi (408.13 km) |
| Castelfranco Emilia to Oberstdorf | 197.87 mi (318.44 km) |
| Castelfranco Emilia to Obertraubling | 306.43 mi (493.16 km) |
| Castelfranco Emilia to Obertshausen | 391.92 mi (630.74 km) |
| Castelfranco Emilia to Oberursel | 404.25 mi (650.58 km) |
| Castelfranco Emilia to Ochsenfurt | 352.20 mi (566.82 km) |
| Castelfranco Emilia to Ochsenhausen | 245.84 mi (395.64 km) |
| Castelfranco Emilia to Ochtrup | 554.57 mi (892.50 km) |
| Castelfranco Emilia to Odenthal | 480.59 mi (773.43 km) |
| Castelfranco Emilia to Oelde | 517.44 mi (832.74 km) |
| Castelfranco Emilia to Oelsnitz | 405.46 mi (652.52 km) |
| Castelfranco Emilia to Oer-Erkenschwick | 517.24 mi (832.41 km) |
