| Alzey to Obernburg am Main | 46.23 mi (74.40 km) |
| Alzey to Obernkirchen | 179.52 mi (288.91 km) |
| Alzey to Oberschleissheim | 187.48 mi (301.72 km) |
| Alzey to Oberstdorf | 189.29 mi (304.63 km) |
| Alzey to Obertraubling | 190.11 mi (305.95 km) |
| Alzey to Obertshausen | 38.89 mi (62.59 km) |
| Alzey to Oberursel | 37.68 mi (60.64 km) |
| Alzey to Ochsenfurt | 87.46 mi (140.75 km) |
| Alzey to Ochsenhausen | 142.46 mi (229.27 km) |
| Alzey to Ochtrup | 174.65 mi (281.07 km) |
| Alzey to Odenthal | 99.24 mi (159.71 km) |
| Alzey to Oelde | 144.24 mi (232.13 km) |
| Alzey to Oelsnitz | 185.49 mi (298.51 km) |
| Alzey to Oer-Erkenschwick | 136.38 mi (219.48 km) |
| Alzey to Oerlinghausen | 155.32 mi (249.97 km) |
