| Costa de Caparica to Orbetello | 1,102.24 mi (1,773.88 km) |
| Costa de Caparica to Oria | 1,431.18 mi (2,303.25 km) |
| Costa de Caparica to Oristano | 955.88 mi (1,538.34 km) |
| Costa de Caparica to Orta Nova | 1,328.94 mi (2,138.72 km) |
| Costa de Caparica to Orte | 1,161.86 mi (1,869.83 km) |
| Costa de Caparica to Ortona | 1,263.61 mi (2,033.58 km) |
| Costa de Caparica to Orvieto | 1,149.90 mi (1,850.59 km) |
| Costa de Caparica to Orzinuovi | 1,085.36 mi (1,746.72 km) |
| Costa de Caparica to Osimo | 1,225.49 mi (1,972.24 km) |
| Costa de Caparica to Ospitaletto | 1,095.25 mi (1,762.63 km) |
| Costa de Caparica to Ostuni | 1,427.63 mi (2,297.55 km) |
| Costa de Caparica to Ottaviano | 1,264.99 mi (2,035.81 km) |
| Costa de Caparica to Ovada | 1,009.15 mi (1,624.07 km) |
| Costa de Caparica to Ozieri | 978.20 mi (1,574.25 km) |
| Costa de Caparica to Paceco | 1,179.16 mi (1,897.67 km) |
