| Seini to Arcos de Valdevez | 1,594.68 mi (2,566.40 km) |
| Seini to Arcozelo | 1,629.31 mi (2,622.12 km) |
| Seini to Arganil | 1,629.56 mi (2,622.53 km) |
| Seini to Arouca | 1,614.92 mi (2,598.96 km) |
| Seini to Arruda dos Vinhos | 1,719.03 mi (2,766.51 km) |
| Seini to Aveiro | 1,643.35 mi (2,644.72 km) |
| Seini to Aver-o-Mar | 1,624.41 mi (2,614.24 km) |
| Seini to Aves | 1,601.56 mi (2,577.46 km) |
| Seini to Azambuja | 1,706.86 mi (2,746.93 km) |
| Seini to Baiao | 1,597.73 mi (2,571.30 km) |
| Seini to Barcelos | 1,613.88 mi (2,597.29 km) |
| Seini to Barreiro | 1,730.46 mi (2,784.91 km) |
| Seini to Batalha | 1,683.30 mi (2,709.01 km) |
| Seini to Beja | 1,699.94 mi (2,735.80 km) |
| Seini to Belas | 1,735.92 mi (2,793.69 km) |
