| Herceg Novi to Oberkirch | 656.67 mi (1,056.80 km) |
| Herceg Novi to Obernburg am Main | 679.05 mi (1,092.82 km) |
| Herceg Novi to Obernkirchen | 807.13 mi (1,298.95 km) |
| Herceg Novi to Oberschleissheim | 523.75 mi (842.90 km) |
| Herceg Novi to Oberstdorf | 528.84 mi (851.09 km) |
| Herceg Novi to Obertraubling | 544.34 mi (876.03 km) |
| Herceg Novi to Obertshausen | 699.81 mi (1,126.24 km) |
| Herceg Novi to Oberursel | 714.52 mi (1,149.91 km) |
| Herceg Novi to Ochsenfurt | 641.05 mi (1,031.67 km) |
| Herceg Novi to Ochsenhausen | 569.42 mi (916.39 km) |
| Herceg Novi to Ochtrup | 855.88 mi (1,377.41 km) |
| Herceg Novi to Odenthal | 800.40 mi (1,288.11 km) |
| Herceg Novi to Oelde | 809.52 mi (1,302.80 km) |
| Herceg Novi to Oelsnitz | 627.63 mi (1,010.07 km) |
| Herceg Novi to Oer-Erkenschwick | 825.81 mi (1,329.02 km) |
