| Llantrisant to Sestu | 1,036.64 mi (1,668.30 km) |
| Llantrisant to Settimo Torinese | 675.40 mi (1,086.95 km) |
| Llantrisant to Seveso | 700.66 mi (1,127.60 km) |
| Llantrisant to Sezze | 1,040.88 mi (1,675.13 km) |
| Llantrisant to Siano | 1,133.80 mi (1,824.68 km) |
| Llantrisant to Siena | 888.96 mi (1,430.64 km) |
| Llantrisant to Signa | 858.23 mi (1,381.19 km) |
| Llantrisant to Silea | 821.14 mi (1,321.49 km) |
| Llantrisant to Silvi Paese | 1,027.21 mi (1,653.13 km) |
| Llantrisant to Sinalunga | 908.27 mi (1,461.72 km) |
| Llantrisant to Siniscola | 980.33 mi (1,577.70 km) |
| Llantrisant to Sinnai | 1,039.54 mi (1,672.98 km) |
| Llantrisant to Siracusa | 1,352.86 mi (2,177.22 km) |
| Llantrisant to Solaro | 699.95 mi (1,126.46 km) |
| Llantrisant to Soliera | 807.47 mi (1,299.50 km) |
