| Ribeira Grande to Orbetello | 1,950.93 mi (3,139.71 km) |
| Ribeira Grande to Oria | 2,296.15 mi (3,695.29 km) |
| Ribeira Grande to Oristano | 1,829.57 mi (2,944.41 km) |
| Ribeira Grande to Orta Nova | 2,188.38 mi (3,521.85 km) |
| Ribeira Grande to Orte | 2,010.57 mi (3,235.70 km) |
| Ribeira Grande to Ortona | 2,113.59 mi (3,401.50 km) |
| Ribeira Grande to Orvieto | 1,995.51 mi (3,211.46 km) |
| Ribeira Grande to Orzinuovi | 1,887.88 mi (3,038.25 km) |
| Ribeira Grande to Osimo | 2,062.08 mi (3,318.59 km) |
| Ribeira Grande to Ospitaletto | 1,895.32 mi (3,050.22 km) |
| Ribeira Grande to Ostuni | 2,290.91 mi (3,686.86 km) |
| Ribeira Grande to Ottaviano | 2,129.03 mi (3,426.35 km) |
| Ribeira Grande to Ovada | 1,822.18 mi (2,932.51 km) |
| Ribeira Grande to Ozieri | 1,846.30 mi (2,971.33 km) |
| Ribeira Grande to Paceco | 2,060.67 mi (3,316.32 km) |
