| Herceg Novi to Oerlinghausen | 802.47 mi (1,291.44 km) |
| Herceg Novi to Oestrich-Winkel | 723.44 mi (1,164.26 km) |
| Herceg Novi to Offenburg | 659.59 mi (1,061.51 km) |
| Herceg Novi to Oftersheim | 674.99 mi (1,086.30 km) |
| Herceg Novi to Ohrdruf | 685.95 mi (1,103.93 km) |
| Herceg Novi to Ohringen | 636.61 mi (1,024.52 km) |
| Herceg Novi to Olbernhau | 618.53 mi (995.42 km) |
| Herceg Novi to Olching | 529.14 mi (851.57 km) |
| Herceg Novi to Oldenburg | 878.35 mi (1,413.56 km) |
| Herceg Novi to Oldenburg in Holstein | 889.38 mi (1,431.32 km) |
| Herceg Novi to Olfen | 825.59 mi (1,328.66 km) |
| Herceg Novi to Olpe | 777.33 mi (1,251.00 km) |
| Herceg Novi to Olsberg | 774.97 mi (1,247.19 km) |
| Herceg Novi to Oranienburg | 752.76 mi (1,211.46 km) |
| Herceg Novi to Ortenberg | 707.35 mi (1,138.36 km) |
