| Longford to Somma Lombardo | 919.59 mi (1,479.94 km) |
| Longford to Somma Vesuviana | 1,358.84 mi (2,186.84 km) |
| Longford to Sommacampagna | 1,009.78 mi (1,625.08 km) |
| Longford to Sona | 1,007.65 mi (1,621.66 km) |
| Longford to Sondrio | 939.28 mi (1,511.63 km) |
| Longford to Sora | 1,287.02 mi (2,071.26 km) |
| Longford to Sorbolo | 1,021.15 mi (1,643.37 km) |
| Longford to Soresina | 979.28 mi (1,576.00 km) |
| Longford to Sorisole | 951.12 mi (1,530.68 km) |
| Longford to Sorrento | 1,369.32 mi (2,203.70 km) |
| Longford to Sorso | 1,172.24 mi (1,886.54 km) |
| Longford to Sortino | 1,578.26 mi (2,539.96 km) |
| Longford to Soverato Marina | 1,546.66 mi (2,489.10 km) |
| Longford to Sovicille | 1,125.06 mi (1,810.61 km) |
| Longford to Spello | 1,190.03 mi (1,915.17 km) |
