| Rhondda to Selargius | 1,046.32 mi (1,683.89 km) |
| Rhondda to Selvazzano Dentro | 816.01 mi (1,313.24 km) |
| Rhondda to Senago | 707.38 mi (1,138.43 km) |
| Rhondda to Senigallia | 943.77 mi (1,518.84 km) |
| Rhondda to Seravezza | 821.20 mi (1,321.59 km) |
| Rhondda to Seregno | 706.85 mi (1,137.57 km) |
| Rhondda to Seriate | 724.56 mi (1,166.07 km) |
| Rhondda to Sermoneta | 1,039.86 mi (1,673.49 km) |
| Rhondda to Serramanna | 1,029.72 mi (1,657.18 km) |
| Rhondda to Serravalle Pistoiese | 847.38 mi (1,363.73 km) |
| Rhondda to Sessa Aurunca | 1,089.34 mi (1,753.13 km) |
| Rhondda to Sesto Calende | 682.33 mi (1,098.10 km) |
| Rhondda to Sesto Fiorentino | 863.76 mi (1,390.08 km) |
| Rhondda to Sesto San Giovanni | 713.31 mi (1,147.95 km) |
| Rhondda to Sestri Levante | 778.36 mi (1,252.66 km) |
