| Rhondda to Sugar Hill (Georgia) | 4,038.76 mi (6,499.76 km) |
| Rhondda to Sugar Land (Texas) | 4,734.14 mi (7,618.86 km) |
| Rhondda to Sugarland Run (Virginia) | 3,535.99 mi (5,690.62 km) |
| Rhondda to Sugarmill Woods (Florida) | 4,236.86 mi (6,818.57 km) |
| Rhondda to Suisun City (California) | 5,210.37 mi (8,385.29 km) |
| Rhondda to Suitland (Maryland) | 3,525.38 mi (5,673.56 km) |
| Rhondda to Sulphur (Louisiana) | 4,609.98 mi (7,419.04 km) |
| Rhondda to Sulphur Springs (Texas) | 4,551.89 mi (7,325.57 km) |
| Rhondda to Summerfield (Maryland) | 3,520.69 mi (5,666.00 km) |
| Rhondda to Summerfield (North Carolina) | 3,768.75 mi (6,065.21 km) |
| Rhondda to Summerlin South (Nevada) | 5,115.84 mi (8,233.15 km) |
| Rhondda to Summerville (South Carolina) | 3,931.00 mi (6,326.34 km) |
| Rhondda to Summit (Illinois) | 3,829.19 mi (6,162.48 km) |
| Rhondda to Summit (New Jersey) | 3,338.68 mi (5,373.08 km) |
| Rhondda to Sumner (Washington) | 4,709.28 mi (7,578.86 km) |
