| Shannon to Settimo Torinese | 915.58 mi (1,473.48 km) |
| Shannon to Seveso | 944.84 mi (1,520.57 km) |
| Shannon to Sezze | 1,281.48 mi (2,062.34 km) |
| Shannon to Siano | 1,375.59 mi (2,213.80 km) |
| Shannon to Siena | 1,130.86 mi (1,819.94 km) |
| Shannon to Signa | 1,100.86 mi (1,771.67 km) |
| Shannon to Silea | 1,067.60 mi (1,718.14 km) |
| Shannon to Silvi Paese | 1,271.33 mi (2,046.01 km) |
| Shannon to Sinalunga | 1,150.58 mi (1,851.68 km) |
| Shannon to Siniscola | 1,209.43 mi (1,946.38 km) |
| Shannon to Sinnai | 1,262.13 mi (2,031.20 km) |
| Shannon to Siracusa | 1,587.91 mi (2,555.50 km) |
| Shannon to Solaro | 943.99 mi (1,519.20 km) |
| Shannon to Soliera | 1,051.90 mi (1,692.88 km) |
| Shannon to Solofra | 1,379.89 mi (2,220.72 km) |
