| Merthyr Tudful to Spello | 960.74 mi (1,546.17 km) |
| Merthyr Tudful to Spilamberto | 827.42 mi (1,331.61 km) |
| Merthyr Tudful to Spilimbergo | 831.34 mi (1,337.91 km) |
| Merthyr Tudful to Spinea | 828.27 mi (1,332.97 km) |
| Merthyr Tudful to Spoleto | 972.55 mi (1,565.18 km) |
| Merthyr Tudful to Spoltore | 1,039.81 mi (1,673.41 km) |
| Merthyr Tudful to Spresiano | 819.85 mi (1,319.42 km) |
| Merthyr Tudful to Squinzano | 1,282.21 mi (2,063.52 km) |
| Merthyr Tudful to Statte | 1,244.10 mi (2,002.19 km) |
| Merthyr Tudful to Stezzano | 726.53 mi (1,169.24 km) |
| Merthyr Tudful to Strada | 883.39 mi (1,421.68 km) |
| Merthyr Tudful to Stradella | 739.72 mi (1,190.46 km) |
| Merthyr Tudful to Striano | 1,136.46 mi (1,828.96 km) |
| Merthyr Tudful to Subiaco | 1,028.19 mi (1,654.71 km) |
| Merthyr Tudful to Sulmona | 1,051.87 mi (1,692.82 km) |
