| Rhondda to Sangeorgiu de Mures | 1,300.62 mi (2,093.14 km) |
| Rhondda to Sangeorz-Bai | 1,286.05 mi (2,069.70 km) |
| Rhondda to Sannicolau Mare | 1,151.84 mi (1,853.71 km) |
| Rhondda to Santana | 1,180.27 mi (1,899.47 km) |
| Rhondda to Satu Mare | 1,197.93 mi (1,927.88 km) |
| Rhondda to Scobinti | 1,382.33 mi (2,224.65 km) |
| Rhondda to Scornicesti | 1,369.13 mi (2,203.40 km) |
| Rhondda to Sebes | 1,280.67 mi (2,061.03 km) |
| Rhondda to Seini | 1,216.00 mi (1,956.96 km) |
| Rhondda to Sfantu-Gheorghe | 1,378.33 mi (2,218.20 km) |
| Rhondda to Sibiu | 1,310.82 mi (2,109.56 km) |
| Rhondda to Sighetu Marmatiei | 1,237.28 mi (1,991.21 km) |
| Rhondda to Sighisoara | 1,324.67 mi (2,131.84 km) |
| Rhondda to Simeria | 1,260.39 mi (2,028.41 km) |
| Rhondda to Sinaia | 1,384.92 mi (2,228.82 km) |
