| Castelginest to Oria | 857.82 mi (1,380.52 km) |
| Castelginest to Oristano | 451.90 mi (727.26 km) |
| Castelginest to Orta Nova | 744.30 mi (1,197.84 km) |
| Castelginest to Orte | 558.90 mi (899.46 km) |
| Castelginest to Ortona | 660.87 mi (1,063.56 km) |
| Castelginest to Orvieto | 541.56 mi (871.56 km) |
| Castelginest to Orzinuovi | 434.62 mi (699.46 km) |
| Castelginest to Osimo | 602.71 mi (969.97 km) |
| Castelginest to Ospitaletto | 443.68 mi (714.04 km) |
| Castelginest to Ostuni | 849.90 mi (1,367.78 km) |
| Castelginest to Ottaviano | 694.41 mi (1,117.55 km) |
| Castelginest to Ovada | 363.31 mi (584.70 km) |
| Castelginest to Ozieri | 443.11 mi (713.12 km) |
| Castelginest to Paceco | 701.44 mi (1,128.86 km) |
| Castelginest to Pachino | 865.72 mi (1,393.24 km) |
