| Upper Grand Lagoon to Sesimbra | 4,286.30 mi (6,898.13 km) |
| Upper Grand Lagoon to Setubal | 4,295.26 mi (6,912.55 km) |
| Upper Grand Lagoon to Sever do Vouga | 4,276.33 mi (6,882.08 km) |
| Upper Grand Lagoon to Silves | 4,347.72 mi (6,996.98 km) |
| Upper Grand Lagoon to Sines | 4,308.86 mi (6,934.44 km) |
| Upper Grand Lagoon to Sintra | 4,264.02 mi (6,862.28 km) |
| Upper Grand Lagoon to Sobrado de Paiva | 4,275.29 mi (6,880.42 km) |
| Upper Grand Lagoon to Sobral de Monte Agraco | 4,271.61 mi (6,874.49 km) |
| Upper Grand Lagoon to Soure | 4,276.78 mi (6,882.81 km) |
| Upper Grand Lagoon to Tabua | 4,300.86 mi (6,921.57 km) |
| Upper Grand Lagoon to Tavira | 4,390.39 mi (7,065.66 km) |
| Upper Grand Lagoon to Tomar | 4,297.02 mi (6,915.39 km) |
| Upper Grand Lagoon to Tondela | 4,294.93 mi (6,912.03 km) |
| Upper Grand Lagoon to Torre de Moncorvo | 4,328.27 mi (6,965.69 km) |
| Upper Grand Lagoon to Torres Novas | 4,293.87 mi (6,910.32 km) |
