| Castel Gandolfo to Selvazzano Dentro | 254.98 mi (410.35 km) |
| Castel Gandolfo to Senago | 318.03 mi (511.82 km) |
| Castel Gandolfo to Senigallia | 138.86 mi (223.47 km) |
| Castel Gandolfo to Seravezza | 198.05 mi (318.73 km) |
| Castel Gandolfo to Seregno | 320.02 mi (515.02 km) |
| Castel Gandolfo to Seriate | 308.97 mi (497.24 km) |
| Castel Gandolfo to Sermoneta | 21.86 mi (35.18 km) |
| Castel Gandolfo to Serramanna | 253.13 mi (407.37 km) |
| Castel Gandolfo to Serravalle Pistoiese | 174.99 mi (281.62 km) |
| Castel Gandolfo to Sessa Aurunca | 75.22 mi (121.05 km) |
| Castel Gandolfo to Sesto Calende | 340.64 mi (548.21 km) |
| Castel Gandolfo to Sesto Fiorentino | 161.86 mi (260.49 km) |
| Castel Gandolfo to Sesto San Giovanni | 312.44 mi (502.82 km) |
| Castel Gandolfo to Sestri Levante | 239.91 mi (386.10 km) |
| Castel Gandolfo to Sestu | 252.06 mi (405.66 km) |
