| Rhondda to Solofra | 1,142.16 mi (1,838.13 km) |
| Rhondda to Somma Lombardo | 687.02 mi (1,105.66 km) |
| Rhondda to Somma Vesuviana | 1,125.47 mi (1,811.26 km) |
| Rhondda to Sommacampagna | 779.57 mi (1,254.60 km) |
| Rhondda to Sona | 777.50 mi (1,251.27 km) |
| Rhondda to Sondrio | 709.69 mi (1,142.13 km) |
| Rhondda to Sora | 1,053.81 mi (1,695.94 km) |
| Rhondda to Sorbolo | 789.11 mi (1,269.95 km) |
| Rhondda to Soresina | 747.37 mi (1,202.78 km) |
| Rhondda to Sorisole | 719.96 mi (1,158.67 km) |
| Rhondda to Sorrento | 1,135.71 mi (1,827.75 km) |
| Rhondda to Sorso | 939.57 mi (1,512.09 km) |
| Rhondda to Sortino | 1,343.85 mi (2,162.71 km) |
| Rhondda to Soverato Marina | 1,313.04 mi (2,113.13 km) |
| Rhondda to Sovicille | 891.57 mi (1,434.84 km) |
