| Duffel to Oignies | 79.54 mi (128.00 km) |
| Duffel to Oissel | 194.09 mi (312.36 km) |
| Duffel to Olivet | 252.52 mi (406.39 km) |
| Duffel to Ollioules | 553.54 mi (890.84 km) |
| Duffel to Olonne-sur-Mer | 425.50 mi (684.78 km) |
| Duffel to Oloron-Sainte-Marie | 596.58 mi (960.10 km) |
| Duffel to Onet Village | 473.76 mi (762.45 km) |
| Duffel to Onnaing | 63.52 mi (102.22 km) |
| Duffel to Orange | 481.20 mi (774.42 km) |
| Duffel to Orchies | 70.40 mi (113.29 km) |
| Duffel to Orleans | 249.96 mi (402.27 km) |
| Duffel to Orly | 188.20 mi (302.88 km) |
| Duffel to Ormesson-sur-Marne | 182.48 mi (293.67 km) |
| Duffel to Orsay | 195.65 mi (314.86 km) |
| Duffel to Orthez | 581.00 mi (935.04 km) |
