| Seini to Santarem | 1,692.62 mi (2,724.01 km) |
| Seini to Santiago do Cacem | 1,737.78 mi (2,796.68 km) |
| Seini to Santo Andre | 1,738.80 mi (2,798.33 km) |
| Seini to Santo Tirso | 1,612.59 mi (2,595.21 km) |
| Seini to Sao Bras de Alportel | 1,734.15 mi (2,790.84 km) |
| Seini to Sao Felix da Marinha | 1,629.22 mi (2,621.98 km) |
| Seini to Sao Joao da Madeira | 1,627.38 mi (2,619.01 km) |
| Seini to Sao Joao de Ver | 1,628.44 mi (2,620.71 km) |
| Seini to Sao Mamede de Infesta | 1,622.93 mi (2,611.85 km) |
| Seini to Sao Pedro do Sul | 1,612.60 mi (2,595.22 km) |
| Seini to Satao | 1,597.73 mi (2,571.30 km) |
| Seini to Seia | 1,606.54 mi (2,585.47 km) |
| Seini to Senhora da Hora | 1,625.73 mi (2,616.35 km) |
| Seini to Serpa | 1,690.39 mi (2,720.42 km) |
| Seini to Serta | 1,645.90 mi (2,648.81 km) |
