| Somma Vesuviana to Oberkirch | 613.92 mi (988.02 km) |
| Somma Vesuviana to Obernburg am Main | 670.39 mi (1,078.89 km) |
| Somma Vesuviana to Obernkirchen | 826.22 mi (1,329.68 km) |
| Somma Vesuviana to Oberschleissheim | 528.85 mi (851.11 km) |
| Somma Vesuviana to Oberstdorf | 496.31 mi (798.74 km) |
| Somma Vesuviana to Obertraubling | 570.04 mi (917.39 km) |
| Somma Vesuviana to Obertshausen | 690.36 mi (1,111.02 km) |
| Somma Vesuviana to Oberursel | 703.77 mi (1,132.61 km) |
| Somma Vesuviana to Ochsenfurt | 642.34 mi (1,033.75 km) |
| Somma Vesuviana to Ochsenhausen | 544.22 mi (875.84 km) |
| Somma Vesuviana to Ochtrup | 854.40 mi (1,375.03 km) |
| Somma Vesuviana to Odenthal | 784.26 mi (1,262.14 km) |
| Somma Vesuviana to Oelde | 813.75 mi (1,309.61 km) |
| Somma Vesuviana to Oelsnitz | 668.41 mi (1,075.70 km) |
| Somma Vesuviana to Oer-Erkenschwick | 818.53 mi (1,317.30 km) |
