| River Falls to Sesimbra | 4,140.22 mi (6,663.04 km) |
| River Falls to Setubal | 4,146.09 mi (6,672.49 km) |
| River Falls to Sever do Vouga | 4,081.16 mi (6,567.98 km) |
| River Falls to Silves | 4,220.37 mi (6,792.03 km) |
| River Falls to Sines | 4,170.30 mi (6,711.45 km) |
| River Falls to Sintra | 4,113.29 mi (6,619.70 km) |
| River Falls to Sobrado de Paiva | 4,073.67 mi (6,555.94 km) |
| River Falls to Sobral de Monte Agraco | 4,114.94 mi (6,622.36 km) |
| River Falls to Soure | 4,096.59 mi (6,592.82 km) |
| River Falls to Tabua | 4,110.42 mi (6,615.09 km) |
| River Falls to Tavira | 4,258.19 mi (6,852.89 km) |
| River Falls to Tomar | 4,123.86 mi (6,636.71 km) |
| River Falls to Tondela | 4,101.90 mi (6,601.37 km) |
| River Falls to Torre de Moncorvo | 4,115.56 mi (6,623.36 km) |
| River Falls to Torres Novas | 4,124.10 mi (6,637.10 km) |
