| Castagneto Carducci to Oria | 406.07 mi (653.51 km) |
| Castagneto Carducci to Oristano | 248.08 mi (399.24 km) |
| Castagneto Carducci to Orta Nova | 290.50 mi (467.52 km) |
| Castagneto Carducci to Orte | 102.84 mi (165.51 km) |
| Castagneto Carducci to Ortona | 200.84 mi (323.22 km) |
| Castagneto Carducci to Orvieto | 82.43 mi (132.66 km) |
| Castagneto Carducci to Orzinuovi | 157.79 mi (253.94 km) |
| Castagneto Carducci to Osimo | 146.56 mi (235.86 km) |
| Castagneto Carducci to Ospitaletto | 167.07 mi (268.88 km) |
| Castagneto Carducci to Ostuni | 396.11 mi (637.48 km) |
| Castagneto Carducci to Ottaviano | 255.39 mi (411.01 km) |
| Castagneto Carducci to Ovada | 140.74 mi (226.50 km) |
| Castagneto Carducci to Ozieri | 196.38 mi (316.04 km) |
| Castagneto Carducci to Paceco | 372.44 mi (599.39 km) |
| Castagneto Carducci to Pachino | 505.21 mi (813.05 km) |
