| Valongo to Orbetello | 1,016.56 mi (1,636.00 km) |
| Valongo to Oria | 1,361.67 mi (2,191.40 km) |
| Valongo to Oristano | 900.24 mi (1,448.80 km) |
| Valongo to Orta Nova | 1,253.51 mi (2,017.33 km) |
| Valongo to Orte | 1,076.30 mi (1,732.14 km) |
| Valongo to Ortona | 1,179.31 mi (1,897.91 km) |
| Valongo to Orvieto | 1,061.71 mi (1,708.66 km) |
| Valongo to Orzinuovi | 969.20 mi (1,559.78 km) |
| Valongo to Osimo | 1,130.64 mi (1,819.60 km) |
| Valongo to Ospitaletto | 977.93 mi (1,573.83 km) |
| Valongo to Ostuni | 1,356.22 mi (2,182.63 km) |
| Valongo to Ottaviano | 1,194.60 mi (1,922.52 km) |
| Valongo to Ovada | 898.03 mi (1,445.24 km) |
| Valongo to Ozieri | 913.71 mi (1,470.48 km) |
| Valongo to Paceco | 1,139.55 mi (1,833.92 km) |
