| Frosinone to Somma Lombardo | 363.64 mi (585.22 km) |
| Frosinone to Somma Vesuviana | 77.14 mi (124.15 km) |
| Frosinone to Sommacampagna | 288.79 mi (464.76 km) |
| Frosinone to Sona | 291.21 mi (468.66 km) |
| Frosinone to Sondrio | 358.04 mi (576.21 km) |
| Frosinone to Sora | 14.92 mi (24.01 km) |
| Frosinone to Sorbolo | 265.68 mi (427.58 km) |
| Frosinone to Soresina | 307.18 mi (494.35 km) |
| Frosinone to Sorisole | 338.25 mi (544.36 km) |
| Frosinone to Sorrento | 87.54 mi (140.89 km) |
| Frosinone to Sorso | 254.65 mi (409.81 km) |
| Frosinone to Sortino | 321.41 mi (517.26 km) |
| Frosinone to Soverato Marina | 264.72 mi (426.02 km) |
| Frosinone to Sovicille | 156.96 mi (252.60 km) |
| Frosinone to Spello | 99.86 mi (160.71 km) |
