| Idrija to Azcoitia | 825.61 mi (1,328.69 km) |
| Idrija to Azpeitia | 823.39 mi (1,325.12 km) |
| Idrija to Azuqueca de Henares | 945.07 mi (1,520.94 km) |
| Idrija to Badajoz | 1,173.85 mi (1,889.13 km) |
| Idrija to Badalona | 667.29 mi (1,073.90 km) |
| Idrija to Baena | 1,104.25 mi (1,777.13 km) |
| Idrija to Baeza | 1,052.00 mi (1,693.04 km) |
| Idrija to Bailen | 1,060.88 mi (1,707.32 km) |
| Idrija to Balaguer | 718.60 mi (1,156.47 km) |
| Idrija to Banolas | 619.40 mi (996.82 km) |
| Idrija to Baranain | 804.19 mi (1,294.22 km) |
| Idrija to Barbadanes | 1,113.18 mi (1,791.49 km) |
| Idrija to Barbastro | 741.81 mi (1,193.84 km) |
| Idrija to Barcelona | 671.64 mi (1,080.90 km) |
| Idrija to Bargas | 1,000.93 mi (1,610.84 km) |
