| Oliveira do Hospital to Orbetello | 996.85 mi (1,604.28 km) |
| Oliveira do Hospital to Oria | 1,336.26 mi (2,150.51 km) |
| Oliveira do Hospital to Oristano | 868.51 mi (1,397.74 km) |
| Oliveira do Hospital to Orta Nova | 1,230.19 mi (1,979.81 km) |
| Oliveira do Hospital to Orte | 1,056.70 mi (1,700.60 km) |
| Oliveira do Hospital to Ortona | 1,159.42 mi (1,865.91 km) |
| Oliveira do Hospital to Orvieto | 1,043.19 mi (1,678.85 km) |
| Oliveira do Hospital to Orzinuovi | 963.45 mi (1,550.52 km) |
| Oliveira do Hospital to Osimo | 1,115.16 mi (1,794.68 km) |
| Oliveira do Hospital to Ospitaletto | 972.79 mi (1,565.55 km) |
| Oliveira do Hospital to Ostuni | 1,331.53 mi (2,142.89 km) |
| Oliveira do Hospital to Ottaviano | 1,169.20 mi (1,881.65 km) |
| Oliveira do Hospital to Ovada | 889.57 mi (1,431.62 km) |
| Oliveira do Hospital to Ozieri | 885.26 mi (1,424.69 km) |
| Oliveira do Hospital to Paceco | 1,103.13 mi (1,775.31 km) |
