| Idrija to Arcos de Valdevez | 1,149.07 mi (1,849.25 km) |
| Idrija to Arcozelo | 1,181.18 mi (1,900.92 km) |
| Idrija to Arganil | 1,178.67 mi (1,896.89 km) |
| Idrija to Arouca | 1,165.98 mi (1,876.47 km) |
| Idrija to Arruda dos Vinhos | 1,266.82 mi (2,038.75 km) |
| Idrija to Aveiro | 1,194.01 mi (1,921.58 km) |
| Idrija to Aver-o-Mar | 1,177.59 mi (1,895.15 km) |
| Idrija to Aves | 1,154.29 mi (1,857.65 km) |
| Idrija to Azambuja | 1,254.64 mi (2,019.15 km) |
| Idrija to Baiao | 1,149.26 mi (1,849.55 km) |
| Idrija to Barcelos | 1,167.27 mi (1,878.54 km) |
| Idrija to Barreiro | 1,277.89 mi (2,056.56 km) |
| Idrija to Batalha | 1,231.92 mi (1,982.58 km) |
| Idrija to Beja | 1,246.68 mi (2,006.34 km) |
| Idrija to Belas | 1,283.57 mi (2,065.71 km) |
