| Sintra to Sestu | 990.49 mi (1,594.03 km) |
| Sintra to Settimo Torinese | 981.29 mi (1,579.23 km) |
| Sintra to Seveso | 1,055.89 mi (1,699.29 km) |
| Sintra to Sezze | 1,197.01 mi (1,926.40 km) |
| Sintra to Siano | 1,281.77 mi (2,062.81 km) |
| Sintra to Siena | 1,120.39 mi (1,803.09 km) |
| Sintra to Signa | 1,114.57 mi (1,793.73 km) |
| Sintra to Silea | 1,201.46 mi (1,933.56 km) |
| Sintra to Silvi Paese | 1,254.36 mi (2,018.70 km) |
| Sintra to Sinalunga | 1,139.31 mi (1,833.54 km) |
| Sintra to Siniscola | 1,020.09 mi (1,641.68 km) |
| Sintra to Sinnai | 996.41 mi (1,603.56 km) |
| Sintra to Siracusa | 1,345.91 mi (2,166.04 km) |
| Sintra to Solaro | 1,052.79 mi (1,694.30 km) |
| Sintra to Soliera | 1,120.56 mi (1,803.37 km) |
