| Twickenham to Sesimbra | 993.85 mi (1,599.44 km) |
| Twickenham to Setubal | 984.45 mi (1,584.31 km) |
| Twickenham to Sever do Vouga | 833.22 mi (1,340.93 km) |
| Twickenham to Silves | 1,062.13 mi (1,709.33 km) |
| Twickenham to Sines | 1,020.45 mi (1,642.26 km) |
| Twickenham to Sintra | 977.35 mi (1,572.89 km) |
| Twickenham to Sobrado de Paiva | 812.21 mi (1,307.12 km) |
| Twickenham to Sobral de Monte Agraco | 958.41 mi (1,542.42 km) |
| Twickenham to Soure | 882.02 mi (1,419.47 km) |
| Twickenham to Tabua | 849.63 mi (1,367.34 km) |
| Twickenham to Tavira | 1,052.97 mi (1,694.59 km) |
| Twickenham to Tomar | 906.00 mi (1,458.07 km) |
| Twickenham to Tondela | 840.82 mi (1,353.18 km) |
| Twickenham to Torre de Moncorvo | 778.04 mi (1,252.13 km) |
| Twickenham to Torres Novas | 916.90 mi (1,475.61 km) |
