| Lisbon to Orbetello | 1,095.98 mi (1,763.81 km) |
| Lisbon to Oria | 1,425.38 mi (2,293.93 km) |
| Lisbon to Oristano | 950.31 mi (1,529.38 km) |
| Lisbon to Orta Nova | 1,322.98 mi (2,129.12 km) |
| Lisbon to Orte | 1,155.62 mi (1,859.79 km) |
| Lisbon to Ortona | 1,257.42 mi (2,023.62 km) |
| Lisbon to Orvieto | 1,143.60 mi (1,840.45 km) |
| Lisbon to Orzinuovi | 1,078.51 mi (1,735.70 km) |
| Lisbon to Osimo | 1,219.06 mi (1,961.89 km) |
| Lisbon to Ospitaletto | 1,088.38 mi (1,751.58 km) |
| Lisbon to Ostuni | 1,421.78 mi (2,288.14 km) |
| Lisbon to Ottaviano | 1,259.14 mi (2,026.39 km) |
| Lisbon to Ovada | 1,002.37 mi (1,613.16 km) |
| Lisbon to Ozieri | 972.41 mi (1,564.94 km) |
| Lisbon to Paceco | 1,174.12 mi (1,889.57 km) |
