| Clayton to Sesimbra | 1,114.33 mi (1,793.34 km) |
| Clayton to Setubal | 1,105.97 mi (1,779.89 km) |
| Clayton to Sever do Vouga | 951.51 mi (1,531.31 km) |
| Clayton to Silves | 1,189.41 mi (1,914.17 km) |
| Clayton to Sines | 1,143.59 mi (1,840.43 km) |
| Clayton to Sintra | 1,095.05 mi (1,762.32 km) |
| Clayton to Sobrado de Paiva | 930.15 mi (1,496.94 km) |
| Clayton to Sobral de Monte Agraco | 1,076.96 mi (1,733.20 km) |
| Clayton to Soure | 1,000.76 mi (1,610.57 km) |
| Clayton to Tabua | 971.46 mi (1,563.42 km) |
| Clayton to Tavira | 1,184.71 mi (1,906.61 km) |
| Clayton to Tomar | 1,027.55 mi (1,653.67 km) |
| Clayton to Tondela | 961.80 mi (1,547.87 km) |
| Clayton to Torre de Moncorvo | 903.47 mi (1,454.00 km) |
| Clayton to Torres Novas | 1,038.08 mi (1,670.62 km) |
