| Helsingor to Oignies | 552.16 mi (888.61 km) |
| Helsingor to Oissel | 666.67 mi (1,072.90 km) |
| Helsingor to Olivet | 724.08 mi (1,165.30 km) |
| Helsingor to Ollioules | 940.04 mi (1,512.85 km) |
| Helsingor to Olonne-sur-Mer | 900.44 mi (1,449.12 km) |
| Helsingor to Oloron-Sainte-Marie | 1,062.45 mi (1,709.85 km) |
| Helsingor to Onet Village | 917.86 mi (1,477.15 km) |
| Helsingor to Onnaing | 538.88 mi (867.25 km) |
| Helsingor to Orange | 890.46 mi (1,433.06 km) |
| Helsingor to Orchies | 544.52 mi (876.33 km) |
| Helsingor to Orleans | 721.67 mi (1,161.42 km) |
| Helsingor to Orly | 661.50 mi (1,064.58 km) |
| Helsingor to Ormesson-sur-Marne | 655.23 mi (1,054.49 km) |
| Helsingor to Orsay | 669.63 mi (1,077.66 km) |
| Helsingor to Orthez | 1,048.75 mi (1,687.79 km) |
