| Viersen to Octeville | 371.05 mi (597.15 km) |
| Viersen to Oignies | 158.06 mi (254.37 km) |
| Viersen to Oissel | 268.85 mi (432.67 km) |
| Viersen to Olivet | 308.99 mi (497.27 km) |
| Viersen to Ollioules | 561.40 mi (903.49 km) |
| Viersen to Olonne-sur-Mer | 493.52 mi (794.24 km) |
| Viersen to Oloron-Sainte-Marie | 646.07 mi (1,039.75 km) |
| Viersen to Onet Village | 507.57 mi (816.86 km) |
| Viersen to Onnaing | 136.10 mi (219.03 km) |
| Viersen to Orange | 497.27 mi (800.28 km) |
| Viersen to Orchies | 147.70 mi (237.70 km) |
| Viersen to Orleans | 306.67 mi (493.54 km) |
| Viersen to Orly | 248.44 mi (399.83 km) |
| Viersen to Ormesson-sur-Marne | 241.76 mi (389.08 km) |
| Viersen to Orsay | 257.27 mi (414.03 km) |
