| Nettuno to Oberkirch | 536.91 mi (864.07 km) |
| Nettuno to Obernburg am Main | 602.89 mi (970.26 km) |
| Nettuno to Obernkirchen | 764.54 mi (1,230.41 km) |
| Nettuno to Oberschleissheim | 471.75 mi (759.21 km) |
| Nettuno to Oberstdorf | 427.12 mi (687.39 km) |
| Nettuno to Obertraubling | 518.71 mi (834.78 km) |
| Nettuno to Obertshausen | 622.05 mi (1,001.08 km) |
| Nettuno to Oberursel | 634.68 mi (1,021.42 km) |
| Nettuno to Ochsenfurt | 579.14 mi (932.03 km) |
| Nettuno to Ochsenhausen | 475.40 mi (765.08 km) |
| Nettuno to Ochtrup | 785.27 mi (1,263.77 km) |
| Nettuno to Odenthal | 711.68 mi (1,145.34 km) |
| Nettuno to Oelde | 747.24 mi (1,202.56 km) |
| Nettuno to Oelsnitz | 618.85 mi (995.94 km) |
| Nettuno to Oer-Erkenschwick | 748.15 mi (1,204.03 km) |
