| Seaford to Arcos de Valdevez | 737.42 mi (1,186.76 km) |
| Seaford to Arcozelo | 790.61 mi (1,272.37 km) |
| Seaford to Arganil | 827.99 mi (1,332.52 km) |
| Seaford to Arouca | 788.26 mi (1,268.58 km) |
| Seaford to Arruda dos Vinhos | 928.23 mi (1,493.84 km) |
| Seaford to Aveiro | 816.51 mi (1,314.05 km) |
| Seaford to Aver-o-Mar | 773.00 mi (1,244.02 km) |
| Seaford to Aves | 758.83 mi (1,221.21 km) |
| Seaford to Azambuja | 918.40 mi (1,478.02 km) |
| Seaford to Baiao | 768.89 mi (1,237.40 km) |
| Seaford to Barcelos | 762.30 mi (1,226.80 km) |
| Seaford to Barreiro | 947.99 mi (1,525.64 km) |
| Seaford to Batalha | 880.58 mi (1,417.15 km) |
| Seaford to Beja | 962.88 mi (1,549.60 km) |
| Seaford to Belas | 945.95 mi (1,522.37 km) |
