| Namsos to Orbetello | 1,521.90 mi (2,449.27 km) |
| Namsos to Oria | 1,674.07 mi (2,694.15 km) |
| Namsos to Oristano | 1,700.96 mi (2,737.44 km) |
| Namsos to Orta Nova | 1,607.25 mi (2,586.62 km) |
| Namsos to Orte | 1,520.82 mi (2,447.53 km) |
| Namsos to Ortona | 1,532.33 mi (2,466.05 km) |
| Namsos to Orvieto | 1,502.79 mi (2,418.50 km) |
| Namsos to Orzinuovi | 1,318.67 mi (2,122.20 km) |
| Namsos to Osimo | 1,451.81 mi (2,336.46 km) |
| Namsos to Ospitaletto | 1,307.71 mi (2,104.56 km) |
| Namsos to Ostuni | 1,657.75 mi (2,667.90 km) |
| Namsos to Ottaviano | 1,636.03 mi (2,632.94 km) |
| Namsos to Ovada | 1,374.30 mi (2,211.72 km) |
| Namsos to Ozieri | 1,653.03 mi (2,660.29 km) |
| Namsos to Paceco | 1,830.26 mi (2,945.52 km) |
