| Boussu to Oestrich-Winkel | 188.23 mi (302.93 km) |
| Boussu to Offenburg | 230.15 mi (370.39 km) |
| Boussu to Oftersheim | 225.35 mi (362.66 km) |
| Boussu to Ohrdruf | 305.12 mi (491.05 km) |
| Boussu to Ohringen | 268.10 mi (431.46 km) |
| Boussu to Olbernhau | 418.73 mi (673.87 km) |
| Boussu to Olching | 371.99 mi (598.66 km) |
| Boussu to Oldenburg | 265.86 mi (427.86 km) |
| Boussu to Oldenburg in Holstein | 400.64 mi (644.76 km) |
| Boussu to Olfen | 179.18 mi (288.36 km) |
| Boussu to Olpe | 181.10 mi (291.46 km) |
| Boussu to Olsberg | 213.84 mi (344.14 km) |
| Boussu to Oranienburg | 435.40 mi (700.71 km) |
| Boussu to Ortenberg | 231.66 mi (372.83 km) |
| Boussu to Oschatz | 410.14 mi (660.05 km) |
