| Sundsvall to Orbetello | 1,401.45 mi (2,255.42 km) |
| Sundsvall to Oria | 1,513.20 mi (2,435.26 km) |
| Sundsvall to Oristano | 1,596.22 mi (2,568.86 km) |
| Sundsvall to Orta Nova | 1,457.24 mi (2,345.21 km) |
| Sundsvall to Orte | 1,392.31 mi (2,240.70 km) |
| Sundsvall to Ortona | 1,390.43 mi (2,237.69 km) |
| Sundsvall to Orvieto | 1,376.29 mi (2,214.92 km) |
| Sundsvall to Orzinuovi | 1,210.57 mi (1,948.23 km) |
| Sundsvall to Osimo | 1,316.17 mi (2,118.17 km) |
| Sundsvall to Ospitaletto | 1,198.72 mi (1,929.15 km) |
| Sundsvall to Ostuni | 1,497.06 mi (2,409.29 km) |
| Sundsvall to Ottaviano | 1,493.59 mi (2,403.70 km) |
| Sundsvall to Ovada | 1,275.14 mi (2,052.13 km) |
| Sundsvall to Ozieri | 1,546.19 mi (2,488.35 km) |
| Sundsvall to Paceco | 1,699.09 mi (2,734.41 km) |
