| Leek to Orbetello | 956.61 mi (1,539.52 km) |
| Leek to Oria | 1,266.18 mi (2,037.71 km) |
| Leek to Oristano | 1,040.00 mi (1,673.73 km) |
| Leek to Orta Nova | 1,157.93 mi (1,863.51 km) |
| Leek to Orte | 990.69 mi (1,594.36 km) |
| Leek to Ortona | 1,060.64 mi (1,706.94 km) |
| Leek to Orvieto | 968.01 mi (1,557.86 km) |
| Leek to Orzinuovi | 756.02 mi (1,216.70 km) |
| Leek to Osimo | 971.01 mi (1,562.69 km) |
| Leek to Ospitaletto | 752.45 mi (1,210.95 km) |
| Leek to Ostuni | 1,252.17 mi (2,015.17 km) |
| Leek to Ottaviano | 1,144.49 mi (1,841.88 km) |
| Leek to Ovada | 758.28 mi (1,220.34 km) |
| Leek to Ozieri | 1,007.46 mi (1,621.35 km) |
| Leek to Paceco | 1,255.41 mi (2,020.38 km) |
