| Helston to Octeville | 164.79 mi (265.21 km) |
| Helston to Oignies | 365.53 mi (588.26 km) |
| Helston to Oissel | 288.85 mi (464.87 km) |
| Helston to Olivet | 359.79 mi (579.03 km) |
| Helston to Ollioules | 712.50 mi (1,146.66 km) |
| Helston to Olonne-sur-Mer | 293.96 mi (473.08 km) |
| Helston to Oloron-Sainte-Marie | 525.66 mi (845.97 km) |
| Helston to Onet Village | 540.80 mi (870.33 km) |
| Helston to Onnaing | 392.12 mi (631.06 km) |
| Helston to Orange | 626.93 mi (1,008.95 km) |
| Helston to Orchies | 376.55 mi (606.00 km) |
| Helston to Orleans | 358.89 mi (577.58 km) |
| Helston to Orly | 356.73 mi (574.11 km) |
| Helston to Ormesson-sur-Marne | 362.16 mi (582.84 km) |
| Helston to Orsay | 348.86 mi (561.44 km) |
