| Issum to Alfena | 1,003.34 mi (1,614.73 km) |
| Issum to Alijo | 966.99 mi (1,556.22 km) |
| Issum to Aljustrel | 1,178.08 mi (1,895.94 km) |
| Issum to Almada | 1,164.08 mi (1,873.41 km) |
| Issum to Almargem | 1,158.20 mi (1,863.95 km) |
| Issum to Almeirim | 1,117.96 mi (1,799.18 km) |
| Issum to Amadora | 1,163.43 mi (1,872.36 km) |
| Issum to Amarante | 986.68 mi (1,587.91 km) |
| Issum to Amares | 976.93 mi (1,572.21 km) |
| Issum to Amora | 1,165.90 mi (1,876.33 km) |
| Issum to Anadia | 1,043.70 mi (1,679.68 km) |
| Issum to Angra do Heroismo | 1,843.73 mi (2,967.20 km) |
| Issum to Ansiao | 1,072.15 mi (1,725.46 km) |
| Issum to Anta | 1,018.94 mi (1,639.83 km) |
| Issum to Arcos de Valdevez | 967.75 mi (1,557.44 km) |
