| Welling to Argentona | 692.81 mi (1,114.97 km) |
| Welling to Arico el Nuevo | 1,823.70 mi (2,934.96 km) |
| Welling to Armilla | 1,005.36 mi (1,617.98 km) |
| Welling to Arnedo | 647.01 mi (1,041.26 km) |
| Welling to Arona | 1,833.93 mi (2,951.43 km) |
| Welling to Arrecife | 1,706.87 mi (2,746.95 km) |
| Welling to Arrigorriaga | 587.00 mi (944.69 km) |
| Welling to Arroyomolinos | 796.73 mi (1,282.21 km) |
| Welling to Arteijo | 691.91 mi (1,113.52 km) |
| Welling to Arucas | 1,805.07 mi (2,904.98 km) |
| Welling to Aspe | 907.08 mi (1,459.80 km) |
| Welling to Astorga | 686.04 mi (1,104.07 km) |
| Welling to Atarfe | 1,001.05 mi (1,611.04 km) |
| Welling to Avila | 780.98 mi (1,256.87 km) |
| Welling to Aviles | 613.57 mi (987.44 km) |
