| Cabeceiras de Basto to Orbetello | 987.43 mi (1,589.11 km) |
| Cabeceiras de Basto to Oria | 1,334.18 mi (2,147.16 km) |
| Cabeceiras de Basto to Oristano | 875.58 mi (1,409.10 km) |
| Cabeceiras de Basto to Orta Nova | 1,225.36 mi (1,972.03 km) |
| Cabeceiras de Basto to Orte | 1,047.09 mi (1,685.13 km) |
| Cabeceiras de Basto to Ortona | 1,150.11 mi (1,850.93 km) |
| Cabeceiras de Basto to Orvieto | 1,032.19 mi (1,661.15 km) |
| Cabeceiras de Basto to Orzinuovi | 936.65 mi (1,507.39 km) |
| Cabeceiras de Basto to Osimo | 1,100.23 mi (1,770.64 km) |
| Cabeceiras de Basto to Ospitaletto | 945.26 mi (1,521.25 km) |
| Cabeceiras de Basto to Ostuni | 1,328.49 mi (2,138.00 km) |
| Cabeceiras de Basto to Ottaviano | 1,167.20 mi (1,878.43 km) |
| Cabeceiras de Basto to Ovada | 866.08 mi (1,393.82 km) |
| Cabeceiras de Basto to Ozieri | 887.69 mi (1,428.61 km) |
| Cabeceiras de Basto to Paceco | 1,116.72 mi (1,797.19 km) |
