| Serinyol to Orbetello | 1,392.55 mi (2,241.10 km) |
| Serinyol to Oria | 1,042.43 mi (1,677.62 km) |
| Serinyol to Oristano | 1,513.96 mi (2,436.49 km) |
| Serinyol to Orta Nova | 1,151.42 mi (1,853.03 km) |
| Serinyol to Orte | 1,333.84 mi (2,146.61 km) |
| Serinyol to Ortona | 1,231.62 mi (1,982.09 km) |
| Serinyol to Orvieto | 1,350.92 mi (2,174.10 km) |
| Serinyol to Orzinuovi | 1,498.43 mi (2,411.49 km) |
| Serinyol to Osimo | 1,294.98 mi (2,084.07 km) |
| Serinyol to Ospitaletto | 1,494.79 mi (2,405.63 km) |
| Serinyol to Ostuni | 1,047.89 mi (1,686.42 km) |
| Serinyol to Ottaviano | 1,209.54 mi (1,946.56 km) |
| Serinyol to Ovada | 1,547.04 mi (2,489.72 km) |
| Serinyol to Ozieri | 1,493.43 mi (2,403.45 km) |
| Serinyol to Paceco | 1,303.27 mi (2,097.42 km) |
