| Castelvetrano to Oberkirch | 786.01 mi (1,264.96 km) |
| Castelvetrano to Obernburg am Main | 859.21 mi (1,382.76 km) |
| Castelvetrano to Obernkirchen | 1,023.14 mi (1,646.58 km) |
| Castelvetrano to Oberschleissheim | 732.69 mi (1,179.15 km) |
| Castelvetrano to Oberstdorf | 684.00 mi (1,100.79 km) |
| Castelvetrano to Obertraubling | 780.17 mi (1,255.57 km) |
| Castelvetrano to Obertshausen | 877.72 mi (1,412.55 km) |
| Castelvetrano to Oberursel | 889.74 mi (1,431.89 km) |
| Castelvetrano to Ochsenfurt | 837.82 mi (1,348.34 km) |
| Castelvetrano to Ochsenhausen | 731.97 mi (1,178.00 km) |
| Castelvetrano to Ochtrup | 1,039.34 mi (1,672.66 km) |
| Castelvetrano to Odenthal | 963.35 mi (1,550.35 km) |
| Castelvetrano to Oelde | 1,003.33 mi (1,614.70 km) |
| Castelvetrano to Oelsnitz | 880.33 mi (1,416.76 km) |
| Castelvetrano to Oer-Erkenschwick | 1,001.45 mi (1,611.68 km) |
