| Ilmenau to Octeville | 560.21 mi (901.56 km) |
| Ilmenau to Oignies | 347.91 mi (559.91 km) |
| Ilmenau to Oissel | 445.75 mi (717.37 km) |
| Ilmenau to Olivet | 450.44 mi (724.91 km) |
| Ilmenau to Ollioules | 573.29 mi (922.62 km) |
| Ilmenau to Olonne-sur-Mer | 645.63 mi (1,039.04 km) |
| Ilmenau to Oloron-Sainte-Marie | 749.03 mi (1,205.45 km) |
| Ilmenau to Onet Village | 583.64 mi (939.27 km) |
| Ilmenau to Onnaing | 322.04 mi (518.27 km) |
| Ilmenau to Orange | 534.51 mi (860.21 km) |
| Ilmenau to Orchies | 336.91 mi (542.20 km) |
| Ilmenau to Orleans | 448.81 mi (722.29 km) |
| Ilmenau to Orly | 403.55 mi (649.45 km) |
| Ilmenau to Ormesson-sur-Marne | 396.32 mi (637.81 km) |
| Ilmenau to Orsay | 413.40 mi (665.31 km) |
