| Seaford to Sesimbra | 962.70 mi (1,549.32 km) |
| Seaford to Setubal | 952.97 mi (1,533.66 km) |
| Seaford to Sever do Vouga | 803.48 mi (1,293.08 km) |
| Seaford to Silves | 1,028.42 mi (1,655.09 km) |
| Seaford to Sines | 988.30 mi (1,590.52 km) |
| Seaford to Sintra | 947.23 mi (1,524.41 km) |
| Seaford to Sobrado de Paiva | 782.70 mi (1,259.64 km) |
| Seaford to Sobral de Monte Agraco | 928.07 mi (1,493.58 km) |
| Seaford to Soure | 851.90 mi (1,371.00 km) |
| Seaford to Tabua | 818.56 mi (1,317.35 km) |
| Seaford to Tavira | 1,017.73 mi (1,637.88 km) |
| Seaford to Tomar | 874.81 mi (1,407.86 km) |
| Seaford to Tondela | 810.10 mi (1,303.74 km) |
| Seaford to Torre de Moncorvo | 746.02 mi (1,200.60 km) |
| Seaford to Torres Novas | 885.79 mi (1,425.54 km) |
