| Ericeira to Orbetello | 1,104.08 mi (1,776.85 km) |
| Ericeira to Oria | 1,435.69 mi (2,310.53 km) |
| Ericeira to Oristano | 961.65 mi (1,547.63 km) |
| Ericeira to Orta Nova | 1,332.53 mi (2,144.50 km) |
| Ericeira to Orte | 1,163.80 mi (1,872.96 km) |
| Ericeira to Ortona | 1,265.85 mi (2,037.20 km) |
| Ericeira to Orvieto | 1,151.44 mi (1,853.07 km) |
| Ericeira to Orzinuovi | 1,082.46 mi (1,742.05 km) |
| Ericeira to Osimo | 1,226.12 mi (1,973.26 km) |
| Ericeira to Ospitaletto | 1,092.17 mi (1,757.67 km) |
| Ericeira to Ostuni | 1,431.88 mi (2,304.39 km) |
| Ericeira to Ottaviano | 1,269.22 mi (2,042.62 km) |
| Ericeira to Ovada | 1,006.97 mi (1,620.55 km) |
| Ericeira to Ozieri | 982.82 mi (1,581.70 km) |
| Ericeira to Paceco | 1,187.37 mi (1,910.89 km) |
