| Barri to Orbetello | 919.38 mi (1,479.60 km) |
| Barri to Oria | 1,247.95 mi (2,008.39 km) |
| Barri to Oristano | 976.85 mi (1,572.09 km) |
| Barri to Orta Nova | 1,135.97 mi (1,828.17 km) |
| Barri to Orte | 959.61 mi (1,544.34 km) |
| Barri to Ortona | 1,038.52 mi (1,671.34 km) |
| Barri to Orvieto | 937.07 mi (1,508.07 km) |
| Barri to Orzinuovi | 732.41 mi (1,178.70 km) |
| Barri to Osimo | 951.64 mi (1,531.51 km) |
| Barri to Ospitaletto | 730.97 mi (1,176.39 km) |
| Barri to Ostuni | 1,234.89 mi (1,987.36 km) |
| Barri to Ottaviano | 1,114.63 mi (1,793.82 km) |
| Barri to Ovada | 720.78 mi (1,159.98 km) |
| Barri to Ozieri | 949.17 mi (1,527.54 km) |
| Barri to Paceco | 1,204.55 mi (1,938.53 km) |
