| Seaham to Sesimbra | 1,189.42 mi (1,914.19 km) |
| Seaham to Setubal | 1,181.13 mi (1,900.85 km) |
| Seaham to Sever do Vouga | 1,026.56 mi (1,652.09 km) |
| Seaham to Silves | 1,264.81 mi (2,035.52 km) |
| Seaham to Sines | 1,218.82 mi (1,961.50 km) |
| Seaham to Sintra | 1,169.97 mi (1,882.89 km) |
| Seaham to Sobrado de Paiva | 1,005.20 mi (1,617.71 km) |
| Seaham to Sobral de Monte Agraco | 1,151.95 mi (1,853.88 km) |
| Seaham to Soure | 1,075.81 mi (1,731.35 km) |
| Seaham to Tabua | 1,046.70 mi (1,684.50 km) |
| Seaham to Tavira | 1,260.24 mi (2,028.15 km) |
| Seaham to Tomar | 1,102.74 mi (1,774.69 km) |
| Seaham to Tondela | 1,037.00 mi (1,668.89 km) |
| Seaham to Torre de Moncorvo | 978.89 mi (1,575.37 km) |
| Seaham to Torres Novas | 1,113.25 mi (1,791.60 km) |
