| Rhondda to Storm Lake (Iowa) | 4,068.19 mi (6,547.11 km) |
| Rhondda to Storrs (Connecticut) | 3,205.65 mi (5,158.99 km) |
| Rhondda to Stoughton (Wisconsin) | 3,831.38 mi (6,166.02 km) |
| Rhondda to Stow (Ohio) | 3,605.61 mi (5,802.67 km) |
| Rhondda to Streamwood (Illinois) | 3,832.56 mi (6,167.91 km) |
| Rhondda to Streator (Illinois) | 3,898.92 mi (6,274.70 km) |
| Rhondda to Streetsboro (Ohio) | 3,599.28 mi (5,792.48 km) |
| Rhondda to Strongsville (Ohio) | 3,615.44 mi (5,818.49 km) |
| Rhondda to Stuart (Florida) | 4,217.83 mi (6,787.94 km) |
| Rhondda to Stuarts Draft (Virginia) | 3,649.60 mi (5,873.46 km) |
| Rhondda to Sturgis (Michigan) | 3,735.48 mi (6,011.67 km) |
| Rhondda to Suamico (Wisconsin) | 3,710.72 mi (5,971.82 km) |
| Rhondda to Sudley (Virginia) | 3,551.74 mi (5,715.97 km) |
| Rhondda to Suffern (New York) | 3,312.57 mi (5,331.06 km) |
| Rhondda to Suffolk (Virginia) | 3,610.60 mi (5,810.69 km) |
