| Sierre to Argentona | 415.30 mi (668.36 km) |
| Sierre to Arico el Nuevo | 1,806.42 mi (2,907.15 km) |
| Sierre to Armilla | 852.90 mi (1,372.61 km) |
| Sierre to Arnedo | 553.36 mi (890.55 km) |
| Sierre to Arona | 1,818.38 mi (2,926.39 km) |
| Sierre to Arrecife | 1,652.84 mi (2,660.00 km) |
| Sierre to Arrigorriaga | 553.53 mi (890.83 km) |
| Sierre to Arroyomolinos | 709.12 mi (1,141.21 km) |
| Sierre to Arteijo | 811.78 mi (1,306.43 km) |
| Sierre to Arucas | 1,772.77 mi (2,853.00 km) |
| Sierre to Aspe | 693.38 mi (1,115.89 km) |
| Sierre to Astorga | 720.81 mi (1,160.03 km) |
| Sierre to Atarfe | 851.51 mi (1,370.37 km) |
| Sierre to Avila | 725.11 mi (1,166.96 km) |
| Sierre to Aviles | 683.35 mi (1,099.75 km) |
