| Watertown Town to Sesimbra | 3,204.02 mi (5,156.37 km) |
| Watertown Town to Setubal | 3,211.71 mi (5,168.75 km) |
| Watertown Town to Sever do Vouga | 3,173.31 mi (5,106.95 km) |
| Watertown Town to Silves | 3,274.74 mi (5,270.18 km) |
| Watertown Town to Sines | 3,230.24 mi (5,198.57 km) |
| Watertown Town to Sintra | 3,179.40 mi (5,116.76 km) |
| Watertown Town to Sobrado de Paiva | 3,169.75 mi (5,101.23 km) |
| Watertown Town to Sobral de Monte Agraco | 3,184.48 mi (5,124.93 km) |
| Watertown Town to Soure | 3,179.78 mi (5,117.36 km) |
| Watertown Town to Tabua | 3,200.00 mi (5,149.90 km) |
| Watertown Town to Tavira | 3,315.66 mi (5,336.03 km) |
| Watertown Town to Tomar | 3,203.16 mi (5,154.99 km) |
| Watertown Town to Tondela | 3,192.97 mi (5,138.59 km) |
| Watertown Town to Torre de Moncorvo | 3,219.12 mi (5,180.67 km) |
| Watertown Town to Torres Novas | 3,201.40 mi (5,152.15 km) |
