| Herceg Novi to Octeville | 1,082.46 mi (1,742.05 km) |
| Herceg Novi to Oignies | 920.88 mi (1,482.01 km) |
| Herceg Novi to Oissel | 960.95 mi (1,546.51 km) |
| Herceg Novi to Olivet | 889.94 mi (1,432.23 km) |
| Herceg Novi to Ollioules | 644.21 mi (1,036.75 km) |
| Herceg Novi to Olonne-sur-Mer | 1,036.41 mi (1,667.95 km) |
| Herceg Novi to Oloron-Sainte-Marie | 969.08 mi (1,559.58 km) |
| Herceg Novi to Onet Village | 809.47 mi (1,302.71 km) |
| Herceg Novi to Onnaing | 895.25 mi (1,440.77 km) |
| Herceg Novi to Orange | 698.92 mi (1,124.81 km) |
| Herceg Novi to Orchies | 911.65 mi (1,467.17 km) |
| Herceg Novi to Orleans | 890.43 mi (1,433.01 km) |
| Herceg Novi to Orly | 890.52 mi (1,433.16 km) |
| Herceg Novi to Ormesson-sur-Marne | 885.59 mi (1,425.22 km) |
| Herceg Novi to Orsay | 897.92 mi (1,445.06 km) |
