| Seaside to Orbetello | 6,224.90 mi (10,018.01 km) |
| Seaside to Oria | 6,520.84 mi (10,494.27 km) |
| Seaside to Oristano | 6,283.41 mi (10,112.17 km) |
| Seaside to Orta Nova | 6,418.79 mi (10,330.04 km) |
| Seaside to Orte | 6,258.49 mi (10,072.06 km) |
| Seaside to Ortona | 6,322.87 mi (10,175.68 km) |
| Seaside to Orvieto | 6,235.83 mi (10,035.61 km) |
| Seaside to Orzinuovi | 6,022.44 mi (9,692.19 km) |
| Seaside to Osimo | 6,232.02 mi (10,029.47 km) |
| Seaside to Ospitaletto | 6,017.91 mi (9,684.89 km) |
| Seaside to Ostuni | 6,505.73 mi (10,469.96 km) |
| Seaside to Ottaviano | 6,411.29 mi (10,317.97 km) |
| Seaside to Ovada | 6,026.23 mi (9,698.28 km) |
| Seaside to Ozieri | 6,259.43 mi (10,073.58 km) |
| Seaside to Paceco | 6,516.51 mi (10,487.31 km) |
