| Idrija to Bormujos | 1,191.35 mi (1,917.30 km) |
| Idrija to Brenes | 1,175.02 mi (1,891.01 km) |
| Idrija to Brunete | 983.91 mi (1,583.45 km) |
| Idrija to Bueu | 1,154.71 mi (1,858.33 km) |
| Idrija to Bullas | 972.47 mi (1,565.03 km) |
| Idrija to Bunol | 877.02 mi (1,411.43 km) |
| Idrija to Burela de Cabo | 1,059.23 mi (1,704.67 km) |
| Idrija to Burgos | 912.03 mi (1,467.77 km) |
| Idrija to Burjasot | 856.94 mi (1,379.11 km) |
| Idrija to Burriana | 827.92 mi (1,332.40 km) |
| Idrija to Cabanaquinta | 983.51 mi (1,582.81 km) |
| Idrija to Cabanillas del Campo | 941.09 mi (1,514.54 km) |
| Idrija to Cabra | 1,115.64 mi (1,795.45 km) |
| Idrija to Caceres | 1,124.48 mi (1,809.68 km) |
| Idrija to Cadiz | 1,236.33 mi (1,989.68 km) |
