| Gradsko to Oberkirch | 827.77 mi (1,332.17 km) |
| Gradsko to Obernburg am Main | 838.95 mi (1,350.15 km) |
| Gradsko to Obernkirchen | 951.94 mi (1,531.99 km) |
| Gradsko to Oberschleissheim | 684.68 mi (1,101.89 km) |
| Gradsko to Oberstdorf | 700.83 mi (1,127.88 km) |
| Gradsko to Obertraubling | 696.42 mi (1,120.77 km) |
| Gradsko to Obertshausen | 859.38 mi (1,383.05 km) |
| Gradsko to Oberursel | 874.14 mi (1,406.80 km) |
| Gradsko to Ochsenfurt | 798.55 mi (1,285.14 km) |
| Gradsko to Ochsenhausen | 738.10 mi (1,187.85 km) |
| Gradsko to Ochtrup | 1,008.39 mi (1,622.85 km) |
| Gradsko to Odenthal | 959.84 mi (1,544.71 km) |
| Gradsko to Oelde | 960.78 mi (1,546.23 km) |
| Gradsko to Oelsnitz | 768.80 mi (1,237.27 km) |
| Gradsko to Oer-Erkenschwick | 981.33 mi (1,579.30 km) |
