| Calasparra to Orbetello | 738.64 mi (1,188.72 km) |
| Calasparra to Oria | 1,042.40 mi (1,677.59 km) |
| Calasparra to Oristano | 563.74 mi (907.25 km) |
| Calasparra to Orta Nova | 947.24 mi (1,524.43 km) |
| Calasparra to Orte | 796.04 mi (1,281.10 km) |
| Calasparra to Ortona | 893.32 mi (1,437.66 km) |
| Calasparra to Orvieto | 788.08 mi (1,268.30 km) |
| Calasparra to Orzinuovi | 775.96 mi (1,248.78 km) |
| Calasparra to Osimo | 870.79 mi (1,401.40 km) |
| Calasparra to Ospitaletto | 787.72 mi (1,267.72 km) |
| Calasparra to Ostuni | 1,040.58 mi (1,674.66 km) |
| Calasparra to Ottaviano | 879.42 mi (1,415.29 km) |
| Calasparra to Ovada | 694.23 mi (1,117.25 km) |
| Calasparra to Ozieri | 593.66 mi (955.40 km) |
| Calasparra to Paceco | 774.15 mi (1,245.87 km) |
