| Neckargemund to Obernburg am Main | 34.45 mi (55.45 km) |
| Neckargemund to Obernkirchen | 198.96 mi (320.20 km) |
| Neckargemund to Oberschleissheim | 148.70 mi (239.31 km) |
| Neckargemund to Oberstdorf | 153.01 mi (246.25 km) |
| Neckargemund to Obertraubling | 155.01 mi (249.47 km) |
| Neckargemund to Obertshausen | 46.51 mi (74.86 km) |
| Neckargemund to Oberursel | 56.78 mi (91.38 km) |
| Neckargemund to Ochsenfurt | 59.61 mi (95.94 km) |
| Neckargemund to Ochsenhausen | 105.30 mi (169.46 km) |
| Neckargemund to Ochtrup | 206.55 mi (332.40 km) |
| Neckargemund to Odenthal | 135.47 mi (218.01 km) |
| Neckargemund to Oelde | 170.92 mi (275.07 km) |
| Neckargemund to Oelsnitz | 165.73 mi (266.71 km) |
| Neckargemund to Oer-Erkenschwick | 169.54 mi (272.85 km) |
| Neckargemund to Oerlinghausen | 177.86 mi (286.23 km) |
