| Castellabate to Octeville | 1,033.21 mi (1,662.80 km) |
| Castellabate to Oignies | 910.17 mi (1,464.78 km) |
| Castellabate to Oissel | 921.32 mi (1,482.73 km) |
| Castellabate to Olivet | 831.42 mi (1,338.03 km) |
| Castellabate to Ollioules | 509.22 mi (819.51 km) |
| Castellabate to Olonne-sur-Mer | 941.70 mi (1,515.51 km) |
| Castellabate to Oloron-Sainte-Marie | 825.78 mi (1,328.96 km) |
| Castellabate to Onet Village | 690.70 mi (1,111.58 km) |
| Castellabate to Onnaing | 887.86 mi (1,428.86 km) |
| Castellabate to Orange | 583.01 mi (938.26 km) |
| Castellabate to Orchies | 902.85 mi (1,453.00 km) |
| Castellabate to Orleans | 832.60 mi (1,339.94 km) |
| Castellabate to Orly | 849.46 mi (1,367.07 km) |
| Castellabate to Ormesson-sur-Marne | 846.14 mi (1,361.73 km) |
| Castellabate to Orsay | 854.81 mi (1,375.69 km) |
