| Helmstedt to Octeville | 578.74 mi (931.39 km) |
| Helmstedt to Oignies | 366.46 mi (589.75 km) |
| Helmstedt to Oissel | 476.46 mi (766.79 km) |
| Helmstedt to Olivet | 503.68 mi (810.59 km) |
| Helmstedt to Ollioules | 671.90 mi (1,081.32 km) |
| Helmstedt to Olonne-sur-Mer | 695.07 mi (1,118.61 km) |
| Helmstedt to Oloron-Sainte-Marie | 823.38 mi (1,325.11 km) |
| Helmstedt to Onet Village | 665.98 mi (1,071.79 km) |
| Helmstedt to Onnaing | 344.29 mi (554.08 km) |
| Helmstedt to Orange | 627.17 mi (1,009.33 km) |
| Helmstedt to Orchies | 356.14 mi (573.15 km) |
| Helmstedt to Orleans | 501.66 mi (807.35 km) |
| Helmstedt to Orly | 448.42 mi (721.67 km) |
| Helmstedt to Ormesson-sur-Marne | 441.35 mi (710.29 km) |
| Helmstedt to Orsay | 457.87 mi (736.88 km) |
