| Santander to Argentona | 342.41 mi (551.06 km) |
| Santander to Arico el Nuevo | 1,269.12 mi (2,042.45 km) |
| Santander to Armilla | 436.28 mi (702.13 km) |
| Santander to Arnedo | 121.96 mi (196.27 km) |
| Santander to Arona | 1,280.19 mi (2,060.26 km) |
| Santander to Arrecife | 1,137.78 mi (1,831.07 km) |
| Santander to Arrigorriaga | 49.43 mi (79.54 km) |
| Santander to Arroyomolinos | 220.88 mi (355.48 km) |
| Santander to Arteijo | 236.55 mi (380.70 km) |
| Santander to Arucas | 1,244.27 mi (2,002.45 km) |
| Santander to Aspe | 387.41 mi (623.48 km) |
| Santander to Astorga | 133.60 mi (215.00 km) |
| Santander to Atarfe | 431.18 mi (693.91 km) |
| Santander to Avila | 199.50 mi (321.06 km) |
| Santander to Aviles | 105.59 mi (169.93 km) |
