| Merthyr Tudful to Sonneberg | 637.98 mi (1,026.73 km) |
| Merthyr Tudful to Sonsbeck | 417.74 mi (672.29 km) |
| Merthyr Tudful to Sonthofen | 676.08 mi (1,088.05 km) |
| Merthyr Tudful to Spaichingen | 594.71 mi (957.09 km) |
| Merthyr Tudful to Spelle | 462.32 mi (744.03 km) |
| Merthyr Tudful to Spenge | 505.41 mi (813.38 km) |
| Merthyr Tudful to Speyer | 544.29 mi (875.96 km) |
| Merthyr Tudful to Spiesen-Elversberg | 490.61 mi (789.57 km) |
| Merthyr Tudful to Spremberg | 759.35 mi (1,222.05 km) |
| Merthyr Tudful to Springe | 550.42 mi (885.81 km) |
| Merthyr Tudful to Sprockhovel | 456.91 mi (735.33 km) |
| Merthyr Tudful to Stade | 552.81 mi (889.65 km) |
| Merthyr Tudful to Stadtallendorf | 538.60 mi (866.80 km) |
| Merthyr Tudful to Stadthagen | 535.76 mi (862.22 km) |
| Merthyr Tudful to Stadtlohn | 439.11 mi (706.68 km) |
