| Duffel to Berga | 634.52 mi (1,021.16 km) |
| Duffel to Berja | 1,051.18 mi (1,691.70 km) |
| Duffel to Bermeo | 629.34 mi (1,012.82 km) |
| Duffel to Berriozar | 640.66 mi (1,031.04 km) |
| Duffel to Betanzos | 803.64 mi (1,293.33 km) |
| Duffel to Betera | 830.57 mi (1,336.67 km) |
| Duffel to Bilbao | 644.06 mi (1,036.51 km) |
| Duffel to Binefar | 669.58 mi (1,077.58 km) |
| Duffel to Binisalem | 792.99 mi (1,276.20 km) |
| Duffel to Blanes | 656.39 mi (1,056.36 km) |
| Duffel to Boadilla del Monte | 841.07 mi (1,353.57 km) |
| Duffel to Boiro | 859.21 mi (1,382.76 km) |
| Duffel to Bolanos de Calatrava | 933.69 mi (1,502.63 km) |
| Duffel to Bollullos de la Mitacion | 1,085.05 mi (1,746.23 km) |
| Duffel to Bollullos par del Condado | 1,094.53 mi (1,761.48 km) |
