| Longford to Settimo Torinese | 914.03 mi (1,470.99 km) |
| Longford to Seveso | 936.94 mi (1,507.86 km) |
| Longford to Sezze | 1,279.09 mi (2,058.50 km) |
| Longford to Siano | 1,371.41 mi (2,207.07 km) |
| Longford to Siena | 1,126.71 mi (1,813.26 km) |
| Longford to Signa | 1,095.57 mi (1,763.15 km) |
| Longford to Silea | 1,051.77 mi (1,692.67 km) |
| Longford to Silvi Paese | 1,263.04 mi (2,032.67 km) |
| Longford to Sinalunga | 1,145.76 mi (1,843.93 km) |
| Longford to Siniscola | 1,218.83 mi (1,961.52 km) |
| Longford to Sinnai | 1,276.45 mi (2,054.24 km) |
| Longford to Siracusa | 1,591.98 mi (2,562.04 km) |
| Longford to Solaro | 936.37 mi (1,506.95 km) |
| Longford to Soliera | 1,043.25 mi (1,678.95 km) |
| Longford to Solofra | 1,375.26 mi (2,213.27 km) |
