| Upper Grand Lagoon to Sestu | 5,169.19 mi (8,319.01 km) |
| Upper Grand Lagoon to Settimo Torinese | 4,933.63 mi (7,939.91 km) |
| Upper Grand Lagoon to Seveso | 4,979.25 mi (8,013.33 km) |
| Upper Grand Lagoon to Sezze | 5,283.95 mi (8,503.70 km) |
| Upper Grand Lagoon to Siano | 5,381.38 mi (8,660.49 km) |
| Upper Grand Lagoon to Siena | 5,147.06 mi (8,283.39 km) |
| Upper Grand Lagoon to Signa | 5,122.17 mi (8,243.33 km) |
| Upper Grand Lagoon to Silea | 5,115.93 mi (8,233.30 km) |
| Upper Grand Lagoon to Silvi Paese | 5,296.37 mi (8,523.69 km) |
| Upper Grand Lagoon to Sinalunga | 5,168.25 mi (8,317.49 km) |
| Upper Grand Lagoon to Siniscola | 5,158.06 mi (8,301.09 km) |
| Upper Grand Lagoon to Sinnai | 5,174.40 mi (8,327.40 km) |
| Upper Grand Lagoon to Siracusa | 5,538.23 mi (8,912.92 km) |
| Upper Grand Lagoon to Solaro | 4,977.74 mi (8,010.90 km) |
| Upper Grand Lagoon to Soliera | 5,084.81 mi (8,183.22 km) |
