| Ialysos to Oria | 634.51 mi (1,021.15 km) |
| Ialysos to Oristano | 1,087.15 mi (1,749.60 km) |
| Ialysos to Orta Nova | 749.30 mi (1,205.89 km) |
| Ialysos to Orte | 937.10 mi (1,508.12 km) |
| Ialysos to Ortona | 839.49 mi (1,351.04 km) |
| Ialysos to Orvieto | 956.68 mi (1,539.62 km) |
| Ialysos to Orzinuovi | 1,131.72 mi (1,821.32 km) |
| Ialysos to Osimo | 915.51 mi (1,473.37 km) |
| Ialysos to Ospitaletto | 1,130.59 mi (1,819.51 km) |
| Ialysos to Ostuni | 643.37 mi (1,035.41 km) |
| Ialysos to Ottaviano | 797.86 mi (1,284.03 km) |
| Ialysos to Ovada | 1,166.98 mi (1,878.07 km) |
| Ialysos to Ozieri | 1,072.17 mi (1,725.49 km) |
| Ialysos to Paceco | 864.30 mi (1,390.96 km) |
| Ialysos to Pachino | 723.92 mi (1,165.04 km) |
