| Issum to Arcozelo | 1,016.85 mi (1,636.46 km) |
| Issum to Arganil | 1,043.48 mi (1,679.31 km) |
| Issum to Arouca | 1,010.41 mi (1,626.10 km) |
| Issum to Arruda dos Vinhos | 1,144.17 mi (1,841.36 km) |
| Issum to Aveiro | 1,039.86 mi (1,673.49 km) |
| Issum to Aver-o-Mar | 1,002.75 mi (1,613.77 km) |
| Issum to Aves | 985.15 mi (1,585.44 km) |
| Issum to Azambuja | 1,133.23 mi (1,823.76 km) |
| Issum to Baiao | 990.96 mi (1,594.80 km) |
| Issum to Barcelos | 991.70 mi (1,595.99 km) |
| Issum to Barreiro | 1,162.01 mi (1,870.07 km) |
| Issum to Batalha | 1,098.55 mi (1,767.95 km) |
| Issum to Beja | 1,163.04 mi (1,871.74 km) |
| Issum to Belas | 1,162.26 mi (1,870.48 km) |
| Issum to Benavente | 1,136.79 mi (1,829.49 km) |
