| Castelsarrasin to Oria | 877.92 mi (1,412.88 km) |
| Castelsarrasin to Oristano | 478.64 mi (770.30 km) |
| Castelsarrasin to Orta Nova | 763.88 mi (1,229.34 km) |
| Castelsarrasin to Orte | 577.54 mi (929.46 km) |
| Castelsarrasin to Ortona | 678.91 mi (1,092.60 km) |
| Castelsarrasin to Orvieto | 559.63 mi (900.64 km) |
| Castelsarrasin to Orzinuovi | 443.15 mi (713.18 km) |
| Castelsarrasin to Osimo | 618.21 mi (994.91 km) |
| Castelsarrasin to Ospitaletto | 451.64 mi (726.84 km) |
| Castelsarrasin to Ostuni | 869.66 mi (1,399.58 km) |
| Castelsarrasin to Ottaviano | 715.49 mi (1,151.47 km) |
| Castelsarrasin to Ovada | 374.73 mi (603.07 km) |
| Castelsarrasin to Ozieri | 468.48 mi (753.95 km) |
| Castelsarrasin to Paceco | 727.64 mi (1,171.02 km) |
| Castelsarrasin to Pachino | 891.63 mi (1,434.94 km) |
