| Serik to Orbetello | 1,121.06 mi (1,804.18 km) |
| Serik to Oria | 766.18 mi (1,233.04 km) |
| Serik to Oristano | 1,232.57 mi (1,983.63 km) |
| Serik to Orta Nova | 877.93 mi (1,412.89 km) |
| Serik to Orte | 1,063.37 mi (1,711.33 km) |
| Serik to Ortona | 962.55 mi (1,549.08 km) |
| Serik to Orvieto | 1,081.57 mi (1,740.62 km) |
| Serik to Orzinuovi | 1,242.03 mi (1,998.86 km) |
| Serik to Osimo | 1,031.67 mi (1,660.32 km) |
| Serik to Ospitaletto | 1,239.55 mi (1,994.87 km) |
| Serik to Ostuni | 772.89 mi (1,243.85 km) |
| Serik to Ottaviano | 932.73 mi (1,501.09 km) |
| Serik to Ovada | 1,284.71 mi (2,067.54 km) |
| Serik to Ozieri | 1,213.90 mi (1,953.59 km) |
| Serik to Paceco | 1,018.48 mi (1,639.09 km) |
