| Merthyr Tudful to Argentona | 754.78 mi (1,214.71 km) |
| Merthyr Tudful to Arico el Nuevo | 1,763.14 mi (2,837.49 km) |
| Merthyr Tudful to Armilla | 1,008.35 mi (1,622.78 km) |
| Merthyr Tudful to Arnedo | 660.93 mi (1,063.66 km) |
| Merthyr Tudful to Arona | 1,772.72 mi (2,852.92 km) |
| Merthyr Tudful to Arrecife | 1,658.89 mi (2,669.72 km) |
| Merthyr Tudful to Arrigorriaga | 590.17 mi (949.78 km) |
| Merthyr Tudful to Arroyomolinos | 793.33 mi (1,276.73 km) |
| Merthyr Tudful to Arteijo | 629.93 mi (1,013.78 km) |
| Merthyr Tudful to Arucas | 1,749.13 mi (2,814.95 km) |
| Merthyr Tudful to Aspe | 934.23 mi (1,503.50 km) |
| Merthyr Tudful to Astorga | 653.66 mi (1,051.97 km) |
| Merthyr Tudful to Atarfe | 1,003.36 mi (1,614.75 km) |
| Merthyr Tudful to Avila | 768.96 mi (1,237.52 km) |
| Merthyr Tudful to Aviles | 577.70 mi (929.71 km) |
