| Boulogne-sur-Mer to Ottendorf-Okrilla | 531.82 mi (855.88 km) |
| Boulogne-sur-Mer to Ottersberg | 360.36 mi (579.94 km) |
| Boulogne-sur-Mer to Ottobrunn | 487.44 mi (784.46 km) |
| Boulogne-sur-Mer to Ottweiler | 263.56 mi (424.16 km) |
| Boulogne-sur-Mer to Overath | 248.49 mi (399.90 km) |
| Boulogne-sur-Mer to Oyten | 354.25 mi (570.12 km) |
| Boulogne-sur-Mer to Paderborn | 316.32 mi (509.06 km) |
| Boulogne-sur-Mer to Papenburg | 294.80 mi (474.44 km) |
| Boulogne-sur-Mer to Parchim | 471.57 mi (758.92 km) |
| Boulogne-sur-Mer to Pasewalk | 558.48 mi (898.78 km) |
| Boulogne-sur-Mer to Passau | 549.88 mi (884.94 km) |
| Boulogne-sur-Mer to Pattensen | 366.22 mi (589.37 km) |
| Boulogne-sur-Mer to Pegnitz | 443.55 mi (713.82 km) |
| Boulogne-sur-Mer to Peine | 386.27 mi (621.64 km) |
| Boulogne-sur-Mer to Peissenberg | 471.16 mi (758.26 km) |
