| Idanha-a-Nova to Siran | 2,423.24 mi (3,899.83 km) |
| Idanha-a-Nova to Sirnak | 2,649.17 mi (4,263.43 km) |
| Idanha-a-Nova to Sirvan | 2,614.64 mi (4,207.85 km) |
| Idanha-a-Nova to Sivas | 2,323.09 mi (3,738.66 km) |
| Idanha-a-Nova to Sivasli | 1,965.01 mi (3,162.38 km) |
| Idanha-a-Nova to Siverek | 2,481.36 mi (3,993.37 km) |
| Idanha-a-Nova to Sivrice | 2,466.34 mi (3,969.18 km) |
| Idanha-a-Nova to Sivrihisar | 2,045.38 mi (3,291.72 km) |
| Idanha-a-Nova to Sogut | 1,966.39 mi (3,164.60 km) |
| Idanha-a-Nova to Sogutlu | 1,969.99 mi (3,170.39 km) |
| Idanha-a-Nova to Soke | 1,858.88 mi (2,991.57 km) |
| Idanha-a-Nova to Solhan | 2,545.26 mi (4,096.20 km) |
| Idanha-a-Nova to Soma | 1,844.99 mi (2,969.23 km) |
| Idanha-a-Nova to Sorgun | 2,228.09 mi (3,585.77 km) |
| Idanha-a-Nova to Suhut | 2,009.26 mi (3,233.60 km) |
