| Rhondda to Sereflikochisar | 1,970.92 mi (3,171.90 km) |
| Rhondda to Serik | 1,960.37 mi (3,154.91 km) |
| Rhondda to Serinhisar | 1,854.95 mi (2,985.25 km) |
| Rhondda to Serinyol | 2,196.73 mi (3,535.29 km) |
| Rhondda to Seydisehir | 1,968.13 mi (3,167.39 km) |
| Rhondda to Seyhan | 2,132.52 mi (3,431.96 km) |
| Rhondda to Seyitgazi | 1,830.15 mi (2,945.35 km) |
| Rhondda to Siirt | 2,371.12 mi (3,815.95 km) |
| Rhondda to Sile | 1,712.24 mi (2,755.59 km) |
| Rhondda to Silifke | 2,101.94 mi (3,382.75 km) |
| Rhondda to Silivri | 1,659.32 mi (2,670.42 km) |
| Rhondda to Silopi | 2,422.77 mi (3,899.07 km) |
| Rhondda to Simav | 1,775.15 mi (2,856.82 km) |
| Rhondda to Sinanpasa | 1,842.16 mi (2,964.68 km) |
| Rhondda to Sindirgi | 1,734.99 mi (2,792.19 km) |
