| Santo Tirso to Siran | 2,460.23 mi (3,959.35 km) |
| Santo Tirso to Sirnak | 2,691.62 mi (4,331.74 km) |
| Santo Tirso to Sirvan | 2,655.88 mi (4,274.22 km) |
| Santo Tirso to Sivas | 2,363.07 mi (3,802.99 km) |
| Santo Tirso to Sivasli | 2,015.18 mi (3,243.12 km) |
| Santo Tirso to Siverek | 2,525.82 mi (4,064.91 km) |
| Santo Tirso to Sivrice | 2,508.67 mi (4,037.32 km) |
| Santo Tirso to Sivrihisar | 2,090.51 mi (3,364.35 km) |
| Santo Tirso to Sogut | 2,010.40 mi (3,235.43 km) |
| Santo Tirso to Sogutlu | 2,010.38 mi (3,235.40 km) |
| Santo Tirso to Soke | 1,913.78 mi (3,079.93 km) |
| Santo Tirso to Solhan | 2,584.60 mi (4,159.51 km) |
| Santo Tirso to Soma | 1,894.17 mi (3,048.37 km) |
| Santo Tirso to Sorgun | 2,269.20 mi (3,651.93 km) |
| Santo Tirso to Suhut | 2,058.54 mi (3,312.90 km) |
