| Somma Vesuviana to Navodari | 758.22 mi (1,220.24 km) |
| Somma Vesuviana to Negresti-Oas | 655.44 mi (1,054.82 km) |
| Somma Vesuviana to Nehoiu | 672.99 mi (1,083.07 km) |
| Somma Vesuviana to Ocna Mures | 605.41 mi (974.32 km) |
| Somma Vesuviana to Odobesti | 718.16 mi (1,155.76 km) |
| Somma Vesuviana to Odorheiu Secuiesc | 660.07 mi (1,062.28 km) |
| Somma Vesuviana to Oltenita | 659.37 mi (1,061.16 km) |
| Somma Vesuviana to Onesti | 719.68 mi (1,158.21 km) |
| Somma Vesuviana to Oradea | 566.90 mi (912.34 km) |
| Somma Vesuviana to Orastie | 558.06 mi (898.10 km) |
| Somma Vesuviana to Oravita | 465.81 mi (749.64 km) |
| Somma Vesuviana to Orsova | 483.05 mi (777.40 km) |
| Somma Vesuviana to Otelu Rosu | 511.47 mi (823.13 km) |
| Somma Vesuviana to Otopeni | 642.17 mi (1,033.48 km) |
| Somma Vesuviana to Ovidiu | 754.84 mi (1,214.81 km) |
