| Grenade to Obernburg am Main | 559.37 mi (900.22 km) |
| Grenade to Obernkirchen | 688.50 mi (1,108.04 km) |
| Grenade to Oberschleissheim | 581.33 mi (935.56 km) |
| Grenade to Oberstdorf | 501.50 mi (807.09 km) |
| Grenade to Obertraubling | 629.56 mi (1,013.18 km) |
| Grenade to Obertshausen | 561.39 mi (903.47 km) |
| Grenade to Oberursel | 560.99 mi (902.83 km) |
| Grenade to Ochsenfurt | 580.43 mi (934.12 km) |
| Grenade to Ochsenhausen | 510.73 mi (821.94 km) |
| Grenade to Ochtrup | 642.88 mi (1,034.61 km) |
| Grenade to Odenthal | 570.47 mi (918.08 km) |
| Grenade to Oelde | 640.86 mi (1,031.36 km) |
| Grenade to Oelsnitz | 686.07 mi (1,104.12 km) |
| Grenade to Oer-Erkenschwick | 609.81 mi (981.40 km) |
| Grenade to Oerlinghausen | 660.61 mi (1,063.16 km) |
