| North Valley Stream to Orbetello | 4,193.65 mi (6,749.03 km) |
| North Valley Stream to Oria | 4,546.56 mi (7,316.98 km) |
| North Valley Stream to Oristano | 4,163.17 mi (6,699.98 km) |
| North Valley Stream to Orta Nova | 4,431.17 mi (7,131.27 km) |
| North Valley Stream to Orte | 4,244.61 mi (6,831.04 km) |
| North Valley Stream to Ortona | 4,336.58 mi (6,979.06 km) |
| North Valley Stream to Orvieto | 4,223.49 mi (6,797.05 km) |
| North Valley Stream to Orzinuovi | 4,039.01 mi (6,500.16 km) |
| North Valley Stream to Osimo | 4,256.46 mi (6,850.10 km) |
| North Valley Stream to Ospitaletto | 4,040.00 mi (6,501.75 km) |
| North Valley Stream to Ostuni | 4,535.43 mi (7,299.07 km) |
| North Valley Stream to Ottaviano | 4,394.70 mi (7,072.59 km) |
| North Valley Stream to Ovada | 4,007.82 mi (6,449.96 km) |
| North Valley Stream to Ozieri | 4,158.54 mi (6,692.52 km) |
| North Valley Stream to Paceco | 4,413.90 mi (7,103.48 km) |
