| Herouville-Saint-Clair to Oria | 1,061.33 mi (1,708.04 km) |
| Herouville-Saint-Clair to Oristano | 776.95 mi (1,250.39 km) |
| Herouville-Saint-Clair to Orta Nova | 947.73 mi (1,525.22 km) |
| Herouville-Saint-Clair to Orte | 767.47 mi (1,235.12 km) |
| Herouville-Saint-Clair to Ortona | 850.82 mi (1,369.26 km) |
| Herouville-Saint-Clair to Orvieto | 745.15 mi (1,199.20 km) |
| Herouville-Saint-Clair to Orzinuovi | 547.18 mi (880.61 km) |
| Herouville-Saint-Clair to Osimo | 766.42 mi (1,233.43 km) |
| Herouville-Saint-Clair to Ospitaletto | 547.30 mi (880.80 km) |
| Herouville-Saint-Clair to Ostuni | 1,048.92 mi (1,688.07 km) |
| Herouville-Saint-Clair to Ottaviano | 922.26 mi (1,484.24 km) |
| Herouville-Saint-Clair to Ovada | 527.38 mi (848.73 km) |
| Herouville-Saint-Clair to Ozieri | 749.24 mi (1,205.79 km) |
| Herouville-Saint-Clair to Paceco | 1,005.20 mi (1,617.71 km) |
| Herouville-Saint-Clair to Pachino | 1,158.62 mi (1,864.61 km) |
