| Prienai to Orbetello | 1,020.77 mi (1,642.78 km) |
| Prienai to Oria | 1,018.83 mi (1,639.64 km) |
| Prienai to Oristano | 1,240.47 mi (1,996.35 km) |
| Prienai to Orta Nova | 993.20 mi (1,598.41 km) |
| Prienai to Orte | 990.52 mi (1,594.10 km) |
| Prienai to Ortona | 952.57 mi (1,533.01 km) |
| Prienai to Orvieto | 981.52 mi (1,579.61 km) |
| Prienai to Orzinuovi | 887.83 mi (1,428.83 km) |
| Prienai to Osimo | 902.12 mi (1,451.83 km) |
| Prienai to Ospitaletto | 875.23 mi (1,408.54 km) |
| Prienai to Ostuni | 1,003.89 mi (1,615.61 km) |
| Prienai to Ottaviano | 1,046.77 mi (1,684.62 km) |
| Prienai to Ovada | 968.26 mi (1,558.26 km) |
| Prienai to Ozieri | 1,188.98 mi (1,913.49 km) |
| Prienai to Paceco | 1,268.69 mi (2,041.75 km) |
