| Rhondda to Stephenville (Texas) | 4,701.42 mi (7,566.20 km) |
| Rhondda to Sterling (Colorado) | 4,457.38 mi (7,173.47 km) |
| Rhondda to Sterling (Illinois) | 3,901.02 mi (6,278.09 km) |
| Rhondda to Sterling (Virginia) | 3,538.31 mi (5,694.36 km) |
| Rhondda to Sterling Heights (Michigan) | 3,607.11 mi (5,805.08 km) |
| Rhondda to Steubenville (Ohio) | 3,610.13 mi (5,809.94 km) |
| Rhondda to Stevens Point (Wisconsin) | 3,771.39 mi (6,069.47 km) |
| Rhondda to Stevenson Ranch (California) | 5,320.78 mi (8,562.97 km) |
| Rhondda to Stillwater (Minnesota) | 3,868.63 mi (6,225.95 km) |
| Rhondda to Stillwater (Oklahoma) | 4,457.81 mi (7,174.15 km) |
| Rhondda to Stockbridge (Georgia) | 4,073.97 mi (6,556.42 km) |
| Rhondda to Stockton (California) | 5,204.35 mi (8,375.59 km) |
| Rhondda to Stone Ridge (Virginia) | 3,547.88 mi (5,709.76 km) |
| Rhondda to Stonecrest (Georgia) | 4,062.51 mi (6,537.97 km) |
| Rhondda to Stony Brook (New York) | 3,279.59 mi (5,277.99 km) |
