| Shannon to Alfena | 793.05 mi (1,276.29 km) |
| Shannon to Alijo | 792.95 mi (1,276.12 km) |
| Shannon to Aljustrel | 1,022.93 mi (1,646.25 km) |
| Shannon to Almada | 969.71 mi (1,560.60 km) |
| Shannon to Almargem | 958.25 mi (1,542.16 km) |
| Shannon to Almeirim | 933.78 mi (1,502.78 km) |
| Shannon to Amadora | 966.11 mi (1,554.80 km) |
| Shannon to Amarante | 791.80 mi (1,274.28 km) |
| Shannon to Amares | 767.13 mi (1,234.58 km) |
| Shannon to Amora | 973.40 mi (1,566.54 km) |
| Shannon to Anadia | 848.74 mi (1,365.92 km) |
| Shannon to Angra do Heroismo | 1,306.86 mi (2,103.18 km) |
| Shannon to Ansiao | 884.43 mi (1,423.35 km) |
| Shannon to Anta | 808.91 mi (1,301.82 km) |
| Shannon to Arcos de Valdevez | 751.09 mi (1,208.77 km) |
