| Duffel to Setubal | 1,085.87 mi (1,747.54 km) |
| Duffel to Sever do Vouga | 944.10 mi (1,519.38 km) |
| Duffel to Silves | 1,152.42 mi (1,854.65 km) |
| Duffel to Sines | 1,118.45 mi (1,799.97 km) |
| Duffel to Sintra | 1,084.63 mi (1,745.54 km) |
| Duffel to Sobrado de Paiva | 924.35 mi (1,487.59 km) |
| Duffel to Sobral de Monte Agraco | 1,065.00 mi (1,713.94 km) |
| Duffel to Soure | 990.60 mi (1,594.22 km) |
| Duffel to Tabua | 954.75 mi (1,536.51 km) |
| Duffel to Tavira | 1,135.86 mi (1,828.00 km) |
| Duffel to Tomar | 1,009.69 mi (1,624.95 km) |
| Duffel to Tondela | 947.53 mi (1,524.91 km) |
| Duffel to Torre de Moncorvo | 880.34 mi (1,416.77 km) |
| Duffel to Torres Novas | 1,020.80 mi (1,642.83 km) |
| Duffel to Torres Vedras | 1,064.71 mi (1,713.49 km) |
