| Merthyr Tudful to Sacile | 822.35 mi (1,323.44 km) |
| Merthyr Tudful to Sala Consilina | 1,194.31 mi (1,922.06 km) |
| Merthyr Tudful to Salemi | 1,241.37 mi (1,997.80 km) |
| Merthyr Tudful to Salerno | 1,150.21 mi (1,851.09 km) |
| Merthyr Tudful to Salo | 761.60 mi (1,225.68 km) |
| Merthyr Tudful to Salsomaggiore Terme | 776.69 mi (1,249.97 km) |
| Merthyr Tudful to Saluzzo | 699.39 mi (1,125.56 km) |
| Merthyr Tudful to Salzano | 824.90 mi (1,327.55 km) |
| Merthyr Tudful to Samarate | 696.34 mi (1,120.65 km) |
| Merthyr Tudful to San Benedetto del Tronto | 1,006.79 mi (1,620.26 km) |
| Merthyr Tudful to San Biagio di Callalta | 828.90 mi (1,333.99 km) |
| Merthyr Tudful to San Bonifacio | 798.59 mi (1,285.21 km) |
| Merthyr Tudful to San Casciano in Val di Pesa | 875.16 mi (1,408.43 km) |
| Merthyr Tudful to San Cataldo | 1,297.05 mi (2,087.39 km) |
| Merthyr Tudful to San Cesareo | 1,023.62 mi (1,647.35 km) |
