| Potters Bar to Argentona | 711.29 mi (1,144.72 km) |
| Potters Bar to Arico el Nuevo | 1,830.30 mi (2,945.59 km) |
| Potters Bar to Armilla | 1,019.05 mi (1,640.01 km) |
| Potters Bar to Arnedo | 661.24 mi (1,064.16 km) |
| Potters Bar to Arona | 1,840.44 mi (2,961.91 km) |
| Potters Bar to Arrecife | 1,715.13 mi (2,760.23 km) |
| Potters Bar to Arrigorriaga | 599.94 mi (965.52 km) |
| Potters Bar to Arroyomolinos | 809.46 mi (1,302.70 km) |
| Potters Bar to Arteijo | 697.19 mi (1,122.02 km) |
| Potters Bar to Arucas | 1,812.30 mi (2,916.61 km) |
| Potters Bar to Aspe | 923.00 mi (1,485.42 km) |
| Potters Bar to Astorga | 695.18 mi (1,118.79 km) |
| Potters Bar to Atarfe | 1,014.67 mi (1,632.95 km) |
| Potters Bar to Avila | 792.73 mi (1,275.78 km) |
| Potters Bar to Aviles | 622.06 mi (1,001.11 km) |
