| Swallownest to Sesimbra | 1,094.89 mi (1,762.06 km) |
| Swallownest to Setubal | 1,086.29 mi (1,748.21 km) |
| Swallownest to Sever do Vouga | 932.33 mi (1,500.43 km) |
| Swallownest to Silves | 1,168.49 mi (1,880.51 km) |
| Swallownest to Sines | 1,123.58 mi (1,808.22 km) |
| Swallownest to Sintra | 1,076.22 mi (1,732.01 km) |
| Swallownest to Sobrado de Paiva | 911.01 mi (1,466.12 km) |
| Swallownest to Sobral de Monte Agraco | 1,057.91 mi (1,702.54 km) |
| Swallownest to Soure | 981.56 mi (1,579.67 km) |
| Swallownest to Tabua | 951.52 mi (1,531.32 km) |
| Swallownest to Tavira | 1,162.75 mi (1,871.26 km) |
| Swallownest to Tomar | 1,007.75 mi (1,621.82 km) |
| Swallownest to Tondela | 942.03 mi (1,516.05 km) |
| Swallownest to Torre de Moncorvo | 882.60 mi (1,420.41 km) |
| Swallownest to Torres Novas | 1,018.38 mi (1,638.92 km) |
