| Seclin to Arcozelo | 861.70 mi (1,386.77 km) |
| Seclin to Arganil | 891.67 mi (1,435.01 km) |
| Seclin to Arouca | 856.43 mi (1,378.29 km) |
| Seclin to Arruda dos Vinhos | 992.58 mi (1,597.41 km) |
| Seclin to Aveiro | 885.63 mi (1,425.28 km) |
| Seclin to Aver-o-Mar | 846.57 mi (1,362.42 km) |
| Seclin to Aves | 829.86 mi (1,335.53 km) |
| Seclin to Azambuja | 981.97 mi (1,580.33 km) |
| Seclin to Baiao | 836.92 mi (1,346.90 km) |
| Seclin to Barcelos | 835.58 mi (1,344.74 km) |
| Seclin to Barreiro | 1,011.11 mi (1,627.22 km) |
| Seclin to Batalha | 946.17 mi (1,522.71 km) |
| Seclin to Beja | 1,016.90 mi (1,636.55 km) |
| Seclin to Belas | 1,010.62 mi (1,626.43 km) |
| Seclin to Benavente | 985.92 mi (1,586.69 km) |
