| Sierning to Arico el Nuevo | 2,140.02 mi (3,444.03 km) |
| Sierning to Armilla | 1,177.28 mi (1,894.64 km) |
| Sierning to Arnedo | 893.07 mi (1,437.25 km) |
| Sierning to Arona | 2,152.13 mi (3,463.52 km) |
| Sierning to Arrecife | 1,982.13 mi (3,189.94 km) |
| Sierning to Arrigorriaga | 893.16 mi (1,437.41 km) |
| Sierning to Arroyomolinos | 1,046.67 mi (1,684.45 km) |
| Sierning to Arteijo | 1,144.57 mi (1,842.01 km) |
| Sierning to Arucas | 2,104.53 mi (3,386.91 km) |
| Sierning to Aspe | 1,009.65 mi (1,624.88 km) |
| Sierning to Astorga | 1,059.53 mi (1,705.15 km) |
| Sierning to Atarfe | 1,176.54 mi (1,893.45 km) |
| Sierning to Avila | 1,064.45 mi (1,713.07 km) |
| Sierning to Aviles | 1,018.61 mi (1,639.29 km) |
| Sierning to Ayamonte | 1,326.69 mi (2,135.10 km) |
