| Welling to Octeville | 148.16 mi (238.44 km) |
| Welling to Oignies | 142.92 mi (230.00 km) |
| Welling to Oissel | 152.56 mi (245.51 km) |
| Welling to Olivet | 261.00 mi (420.03 km) |
| Welling to Ollioules | 634.13 mi (1,020.53 km) |
| Welling to Olonne-sur-Mer | 350.68 mi (564.36 km) |
| Welling to Oloron-Sainte-Marie | 572.05 mi (920.62 km) |
| Welling to Onet Village | 503.37 mi (810.10 km) |
| Welling to Onnaing | 168.99 mi (271.96 km) |
| Welling to Orange | 550.58 mi (886.08 km) |
| Welling to Orchies | 152.40 mi (245.27 km) |
| Welling to Orleans | 258.57 mi (416.12 km) |
| Welling to Orly | 213.14 mi (343.02 km) |
| Welling to Ormesson-sur-Marne | 213.74 mi (343.99 km) |
| Welling to Orsay | 211.84 mi (340.93 km) |
