| Castelfiorentino to Octeville | 727.58 mi (1,170.93 km) |
| Castelfiorentino to Oignies | 604.45 mi (972.76 km) |
| Castelfiorentino to Oissel | 614.11 mi (988.32 km) |
| Castelfiorentino to Olivet | 526.69 mi (847.63 km) |
| Castelfiorentino to Ollioules | 259.07 mi (416.93 km) |
| Castelfiorentino to Olonne-sur-Mer | 653.06 mi (1,050.99 km) |
| Castelfiorentino to Oloron-Sainte-Marie | 581.23 mi (935.41 km) |
| Castelfiorentino to Onet Village | 419.44 mi (675.02 km) |
| Castelfiorentino to Onnaing | 582.95 mi (938.16 km) |
| Castelfiorentino to Orange | 308.86 mi (497.06 km) |
| Castelfiorentino to Orchies | 597.53 mi (961.63 km) |
| Castelfiorentino to Orleans | 527.72 mi (849.28 km) |
| Castelfiorentino to Orly | 542.18 mi (872.56 km) |
| Castelfiorentino to Ormesson-sur-Marne | 538.76 mi (867.05 km) |
| Castelfiorentino to Orsay | 547.72 mi (881.47 km) |
