| Weymouth to Orbetello | 858.50 mi (1,381.63 km) |
| Weymouth to Oria | 1,190.75 mi (1,916.32 km) |
| Weymouth to Oristano | 912.23 mi (1,468.10 km) |
| Weymouth to Orta Nova | 1,078.04 mi (1,734.94 km) |
| Weymouth to Orte | 899.93 mi (1,448.30 km) |
| Weymouth to Ortona | 980.76 mi (1,578.38 km) |
| Weymouth to Orvieto | 877.48 mi (1,412.16 km) |
| Weymouth to Orzinuovi | 675.29 mi (1,086.77 km) |
| Weymouth to Osimo | 894.79 mi (1,440.03 km) |
| Weymouth to Ospitaletto | 674.43 mi (1,085.39 km) |
| Weymouth to Ostuni | 1,177.94 mi (1,895.72 km) |
| Weymouth to Ottaviano | 1,054.92 mi (1,697.73 km) |
| Weymouth to Ovada | 660.40 mi (1,062.81 km) |
| Weymouth to Ozieri | 885.02 mi (1,424.30 km) |
| Weymouth to Paceco | 1,141.07 mi (1,836.38 km) |
