| Caister-on-Sea to Alenquer | 1,070.08 mi (1,722.12 km) |
| Caister-on-Sea to Alfena | 923.14 mi (1,485.65 km) |
| Caister-on-Sea to Alijo | 896.23 mi (1,442.35 km) |
| Caister-on-Sea to Aljustrel | 1,123.62 mi (1,808.29 km) |
| Caister-on-Sea to Almada | 1,096.45 mi (1,764.57 km) |
| Caister-on-Sea to Almargem | 1,088.56 mi (1,751.87 km) |
| Caister-on-Sea to Almeirim | 1,051.68 mi (1,692.51 km) |
| Caister-on-Sea to Amadora | 1,094.83 mi (1,761.96 km) |
| Caister-on-Sea to Amarante | 910.42 mi (1,465.18 km) |
| Caister-on-Sea to Amares | 895.38 mi (1,440.97 km) |
| Caister-on-Sea to Amora | 1,098.94 mi (1,768.57 km) |
| Caister-on-Sea to Anadia | 970.49 mi (1,561.86 km) |
| Caister-on-Sea to Angra do Heroismo | 1,681.66 mi (2,706.36 km) |
| Caister-on-Sea to Ansiao | 1,002.65 mi (1,613.61 km) |
| Caister-on-Sea to Anta | 939.67 mi (1,512.25 km) |
