| Ponte da Barca to Orbetello | 1,004.72 mi (1,616.94 km) |
| Ponte da Barca to Oria | 1,353.07 mi (2,177.56 km) |
| Ponte da Barca to Oristano | 896.95 mi (1,443.50 km) |
| Ponte da Barca to Orta Nova | 1,243.63 mi (2,001.43 km) |
| Ponte da Barca to Orte | 1,064.27 mi (1,712.77 km) |
| Ponte da Barca to Ortona | 1,167.28 mi (1,878.55 km) |
| Ponte da Barca to Orvieto | 1,049.01 mi (1,688.22 km) |
| Ponte da Barca to Orzinuovi | 948.89 mi (1,527.10 km) |
| Ponte da Barca to Osimo | 1,115.88 mi (1,795.83 km) |
| Ponte da Barca to Ospitaletto | 957.25 mi (1,540.55 km) |
| Ponte da Barca to Ostuni | 1,347.14 mi (2,168.01 km) |
| Ponte da Barca to Ottaviano | 1,186.22 mi (1,909.03 km) |
| Ponte da Barca to Ovada | 879.48 mi (1,415.39 km) |
| Ponte da Barca to Ozieri | 908.03 mi (1,461.33 km) |
| Ponte da Barca to Paceco | 1,139.23 mi (1,833.41 km) |
