| Niksar to Solofra | 1,155.42 mi (1,859.46 km) |
| Niksar to Somma Lombardo | 1,459.87 mi (2,349.44 km) |
| Niksar to Somma Vesuviana | 1,176.57 mi (1,893.50 km) |
| Niksar to Sommacampagna | 1,354.64 mi (2,180.09 km) |
| Niksar to Sona | 1,355.65 mi (2,181.70 km) |
| Niksar to Sondrio | 1,406.77 mi (2,263.98 km) |
| Niksar to Sora | 1,213.61 mi (1,953.12 km) |
| Niksar to Sorbolo | 1,371.51 mi (2,207.24 km) |
| Niksar to Soresina | 1,402.13 mi (2,256.52 km) |
| Niksar to Sorisole | 1,414.14 mi (2,275.84 km) |
| Niksar to Sorrento | 1,181.87 mi (1,902.04 km) |
| Niksar to Sorso | 1,480.83 mi (2,383.16 km) |
| Niksar to Sortino | 1,199.88 mi (1,931.02 km) |
| Niksar to Soverato Marina | 1,091.82 mi (1,757.12 km) |
| Niksar to Sovicille | 1,330.41 mi (2,141.09 km) |
