| Slough to Alenquer | 951.86 mi (1,531.87 km) |
| Slough to Alfena | 803.08 mi (1,292.44 km) |
| Slough to Alijo | 778.61 mi (1,253.05 km) |
| Slough to Aljustrel | 1,008.81 mi (1,623.53 km) |
| Slough to Almada | 978.38 mi (1,574.55 km) |
| Slough to Almargem | 970.04 mi (1,561.13 km) |
| Slough to Almeirim | 934.17 mi (1,503.40 km) |
| Slough to Amadora | 976.53 mi (1,571.58 km) |
| Slough to Amarante | 791.35 mi (1,273.55 km) |
| Slough to Amares | 775.19 mi (1,247.54 km) |
| Slough to Amora | 981.02 mi (1,578.79 km) |
| Slough to Anadia | 851.77 mi (1,370.79 km) |
| Slough to Angra do Heroismo | 1,559.58 mi (2,509.91 km) |
| Slough to Ansiao | 884.63 mi (1,423.67 km) |
| Slough to Anta | 819.72 mi (1,319.22 km) |
