| Marmara Ereglisi to Orbetello | 868.17 mi (1,397.19 km) |
| Marmara Ereglisi to Oria | 541.06 mi (870.75 km) |
| Marmara Ereglisi to Oristano | 1,018.85 mi (1,639.68 km) |
| Marmara Ereglisi to Orta Nova | 636.96 mi (1,025.10 km) |
| Marmara Ereglisi to Orte | 808.40 mi (1,301.00 km) |
| Marmara Ereglisi to Ortona | 705.42 mi (1,135.26 km) |
| Marmara Ereglisi to Orvieto | 823.22 mi (1,324.84 km) |
| Marmara Ereglisi to Orzinuovi | 955.70 mi (1,538.05 km) |
| Marmara Ereglisi to Osimo | 759.46 mi (1,222.23 km) |
| Marmara Ereglisi to Ospitaletto | 951.44 mi (1,531.19 km) |
| Marmara Ereglisi to Ostuni | 542.00 mi (872.26 km) |
| Marmara Ereglisi to Ottaviano | 703.12 mi (1,131.56 km) |
| Marmara Ereglisi to Ovada | 1,008.45 mi (1,622.95 km) |
| Marmara Ereglisi to Ozieri | 990.00 mi (1,593.26 km) |
| Marmara Ereglisi to Paceco | 845.86 mi (1,361.29 km) |
