| Castellammare del Golfo to Oberkirch | 764.61 mi (1,230.52 km) |
| Castellammare del Golfo to Obernburg am Main | 836.90 mi (1,346.85 km) |
| Castellammare del Golfo to Obernkirchen | 1,000.48 mi (1,610.11 km) |
| Castellammare del Golfo to Oberschleissheim | 709.45 mi (1,141.75 km) |
| Castellammare del Golfo to Oberstdorf | 661.53 mi (1,064.63 km) |
| Castellammare del Golfo to Obertraubling | 756.68 mi (1,217.75 km) |
| Castellammare del Golfo to Obertshausen | 855.51 mi (1,376.80 km) |
| Castellammare del Golfo to Oberursel | 867.62 mi (1,396.30 km) |
| Castellammare del Golfo to Ochsenfurt | 815.11 mi (1,311.79 km) |
| Castellammare del Golfo to Ochsenhausen | 709.57 mi (1,141.94 km) |
| Castellammare del Golfo to Ochtrup | 1,017.42 mi (1,637.38 km) |
| Castellammare del Golfo to Odenthal | 941.73 mi (1,515.57 km) |
| Castellammare del Golfo to Oelde | 981.09 mi (1,578.92 km) |
| Castellammare del Golfo to Oelsnitz | 856.81 mi (1,378.89 km) |
| Castellammare del Golfo to Oer-Erkenschwick | 979.63 mi (1,576.55 km) |
