| Boussu to Oignies | 35.39 mi (56.96 km) |
| Boussu to Oissel | 142.05 mi (228.60 km) |
| Boussu to Olivet | 197.09 mi (317.18 km) |
| Boussu to Ollioules | 513.15 mi (825.83 km) |
| Boussu to Olonne-sur-Mer | 370.67 mi (596.53 km) |
| Boussu to Oloron-Sainte-Marie | 541.51 mi (871.48 km) |
| Boussu to Onet Village | 422.96 mi (680.69 km) |
| Boussu to Onnaing | 9.26 mi (14.91 km) |
| Boussu to Orange | 437.50 mi (704.09 km) |
| Boussu to Orchies | 24.45 mi (39.35 km) |
| Boussu to Orleans | 194.51 mi (313.03 km) |
| Boussu to Orly | 132.56 mi (213.33 km) |
| Boussu to Ormesson-sur-Marne | 126.98 mi (204.36 km) |
| Boussu to Orsay | 139.87 mi (225.10 km) |
| Boussu to Orthez | 525.71 mi (846.05 km) |
