| Riga to Solofra | 1,187.71 mi (1,911.43 km) |
| Riga to Somma Lombardo | 1,019.21 mi (1,640.26 km) |
| Riga to Somma Vesuviana | 1,191.67 mi (1,917.80 km) |
| Riga to Sommacampagna | 979.43 mi (1,576.24 km) |
| Riga to Sona | 977.87 mi (1,573.73 km) |
| Riga to Sondrio | 959.75 mi (1,544.56 km) |
| Riga to Sora | 1,150.51 mi (1,851.56 km) |
| Riga to Sorbolo | 1,022.33 mi (1,645.28 km) |
| Riga to Soresina | 1,011.26 mi (1,627.46 km) |
| Riga to Sorisole | 990.29 mi (1,593.72 km) |
| Riga to Sorrento | 1,208.77 mi (1,945.33 km) |
| Riga to Sorso | 1,313.46 mi (2,113.81 km) |
| Riga to Sortino | 1,429.07 mi (2,299.86 km) |
| Riga to Soverato Marina | 1,307.92 mi (2,104.90 km) |
| Riga to Sovicille | 1,099.00 mi (1,768.68 km) |
