| Slough to Ames | 703.60 mi (1,132.33 km) |
| Slough to Amorebieta | 581.40 mi (935.67 km) |
| Slough to Amposta | 748.13 mi (1,203.99 km) |
| Slough to Amurrio | 594.99 mi (957.54 km) |
| Slough to Andoain | 576.76 mi (928.20 km) |
| Slough to Andraitx | 837.11 mi (1,347.20 km) |
| Slough to Andujar | 945.72 mi (1,521.99 km) |
| Slough to Antequera | 1,019.88 mi (1,641.34 km) |
| Slough to Antigua | 1,740.30 mi (2,800.75 km) |
| Slough to Aranda de Duero | 694.40 mi (1,117.53 km) |
| Slough to Aranjuez | 805.87 mi (1,296.92 km) |
| Slough to Archena | 926.04 mi (1,490.32 km) |
| Slough to Arcos de la Frontera | 1,051.27 mi (1,691.86 km) |
| Slough to Arenys de Mar | 701.71 mi (1,129.29 km) |
| Slough to Arenys de Munt | 699.51 mi (1,125.76 km) |
