| Holyhead to Alenquer | 1,006.79 mi (1,620.27 km) |
| Holyhead to Alfena | 853.41 mi (1,373.44 km) |
| Holyhead to Alijo | 841.82 mi (1,354.77 km) |
| Holyhead to Aljustrel | 1,076.79 mi (1,732.93 km) |
| Holyhead to Almada | 1,033.29 mi (1,662.92 km) |
| Holyhead to Almargem | 1,023.07 mi (1,646.48 km) |
| Holyhead to Almeirim | 992.84 mi (1,597.83 km) |
| Holyhead to Amadora | 1,030.44 mi (1,658.33 km) |
| Holyhead to Amarante | 847.20 mi (1,363.44 km) |
| Holyhead to Amares | 825.85 mi (1,329.08 km) |
| Holyhead to Amora | 1,036.56 mi (1,668.18 km) |
| Holyhead to Anadia | 907.22 mi (1,460.03 km) |
| Holyhead to Angra do Heroismo | 1,471.59 mi (2,368.29 km) |
| Holyhead to Ansiao | 942.39 mi (1,516.62 km) |
| Holyhead to Anta | 870.06 mi (1,400.22 km) |
