| Mont-de-Marsan to Settimo Torinese | 416.07 mi (669.60 km) |
| Mont-de-Marsan to Seveso | 487.70 mi (784.87 km) |
| Mont-de-Marsan to Sezze | 707.56 mi (1,138.71 km) |
| Mont-de-Marsan to Siano | 803.39 mi (1,292.94 km) |
| Mont-de-Marsan to Siena | 592.76 mi (953.95 km) |
| Mont-de-Marsan to Signa | 577.70 mi (929.71 km) |
| Mont-de-Marsan to Silea | 638.68 mi (1,027.85 km) |
| Mont-de-Marsan to Silvi Paese | 740.76 mi (1,192.15 km) |
| Mont-de-Marsan to Sinalunga | 613.77 mi (987.77 km) |
| Mont-de-Marsan to Siniscola | 569.20 mi (916.04 km) |
| Mont-de-Marsan to Sinnai | 592.55 mi (953.62 km) |
| Mont-de-Marsan to Siracusa | 951.88 mi (1,531.91 km) |
| Mont-de-Marsan to Solaro | 484.79 mi (780.19 km) |
| Mont-de-Marsan to Soliera | 567.36 mi (913.07 km) |
| Mont-de-Marsan to Solofra | 810.29 mi (1,304.03 km) |
