| Helsinge to Oignies | 539.52 mi (868.27 km) |
| Helsinge to Oissel | 653.84 mi (1,052.25 km) |
| Helsinge to Olivet | 712.62 mi (1,146.86 km) |
| Helsinge to Ollioules | 933.50 mi (1,502.33 km) |
| Helsinge to Olonne-sur-Mer | 887.87 mi (1,428.89 km) |
| Helsinge to Oloron-Sainte-Marie | 1,051.83 mi (1,692.76 km) |
| Helsinge to Onet Village | 908.59 mi (1,462.24 km) |
| Helsinge to Onnaing | 526.68 mi (847.61 km) |
| Helsinge to Orange | 882.82 mi (1,420.75 km) |
| Helsinge to Orchies | 532.03 mi (856.21 km) |
| Helsinge to Orleans | 710.19 mi (1,142.95 km) |
| Helsinge to Orly | 649.77 mi (1,045.71 km) |
| Helsinge to Ormesson-sur-Marne | 643.57 mi (1,035.72 km) |
| Helsinge to Orsay | 657.81 mi (1,058.65 km) |
| Helsinge to Orthez | 1,037.93 mi (1,670.39 km) |
