| Idrija to Borsbeek | 564.14 mi (907.89 km) |
| Idrija to Boussu | 561.00 mi (902.84 km) |
| Idrija to Braine-l'Alleud | 548.03 mi (881.97 km) |
| Idrija to Braine-le-Chateau | 552.02 mi (888.39 km) |
| Idrija to Braine-le-Comte | 553.98 mi (891.54 km) |
| Idrija to Brasschaat | 567.71 mi (913.64 km) |
| Idrija to Brecht | 565.09 mi (909.42 km) |
| Idrija to Bredene | 619.80 mi (997.48 km) |
| Idrija to Bree | 523.54 mi (842.56 km) |
| Idrija to Bruges | 609.75 mi (981.30 km) |
| Idrija to Brussels | 554.96 mi (893.13 km) |
| Idrija to Buggenhout | 566.35 mi (911.46 km) |
| Idrija to Chapelle-lez-Herlaimont | 543.59 mi (874.82 km) |
| Idrija to Charleroi | 535.56 mi (861.90 km) |
| Idrija to Chatelet | 532.41 mi (856.83 km) |
