| Gujan-Mestras to Settimo Torinese | 433.58 mi (697.77 km) |
| Gujan-Mestras to Seveso | 501.81 mi (807.58 km) |
| Gujan-Mestras to Sezze | 744.46 mi (1,198.09 km) |
| Gujan-Mestras to Siano | 841.16 mi (1,353.72 km) |
| Gujan-Mestras to Siena | 622.51 mi (1,001.83 km) |
| Gujan-Mestras to Signa | 604.87 mi (973.44 km) |
| Gujan-Mestras to Silea | 654.24 mi (1,052.90 km) |
| Gujan-Mestras to Silvi Paese | 772.15 mi (1,242.66 km) |
| Gujan-Mestras to Sinalunga | 643.78 mi (1,036.07 km) |
| Gujan-Mestras to Siniscola | 614.43 mi (988.82 km) |
| Gujan-Mestras to Sinnai | 642.74 mi (1,034.40 km) |
| Gujan-Mestras to Siracusa | 999.15 mi (1,607.97 km) |
| Gujan-Mestras to Solaro | 499.08 mi (803.20 km) |
| Gujan-Mestras to Soliera | 588.54 mi (947.17 km) |
| Gujan-Mestras to Solofra | 847.78 mi (1,364.37 km) |
