| Willebroek to Setubal | 1,079.81 mi (1,737.79 km) |
| Willebroek to Sever do Vouga | 937.84 mi (1,509.31 km) |
| Willebroek to Silves | 1,146.58 mi (1,845.24 km) |
| Willebroek to Sines | 1,112.46 mi (1,790.33 km) |
| Willebroek to Sintra | 1,078.47 mi (1,735.63 km) |
| Willebroek to Sobrado de Paiva | 918.06 mi (1,477.48 km) |
| Willebroek to Sobral de Monte Agraco | 1,058.84 mi (1,704.04 km) |
| Willebroek to Soure | 984.39 mi (1,584.23 km) |
| Willebroek to Tabua | 948.58 mi (1,526.60 km) |
| Willebroek to Tavira | 1,130.16 mi (1,818.81 km) |
| Willebroek to Tomar | 1,003.57 mi (1,615.10 km) |
| Willebroek to Tondela | 941.34 mi (1,514.95 km) |
| Willebroek to Torre de Moncorvo | 874.20 mi (1,406.88 km) |
| Willebroek to Torres Novas | 1,014.68 mi (1,632.97 km) |
| Willebroek to Torres Vedras | 1,058.53 mi (1,703.55 km) |
