| Rhondda to Scottsboro (Alabama) | 4,094.57 mi (6,589.57 km) |
| Rhondda to Scottsdale (Arizona) | 5,130.81 mi (8,257.24 km) |
| Rhondda to Scranton (Pennsylvania) | 3,362.58 mi (5,411.55 km) |
| Rhondda to Seabrook (Maryland) | 3,516.59 mi (5,659.40 km) |
| Rhondda to Seabrook (Texas) | 4,710.52 mi (7,580.85 km) |
| Rhondda to Seaford (New York) | 3,304.75 mi (5,318.48 km) |
| Rhondda to Seagoville (Texas) | 4,613.43 mi (7,424.60 km) |
| Rhondda to Seal Beach (California) | 5,339.52 mi (8,593.12 km) |
| Rhondda to Searcy (Arkansas) | 4,293.96 mi (6,910.45 km) |
| Rhondda to Seaside (California) | 5,297.38 mi (8,525.30 km) |
| Rhondda to SeaTac (Washington) | 4,698.44 mi (7,561.41 km) |
| Rhondda to Seattle (Washington) | 4,689.26 mi (7,546.63 km) |
| Rhondda to Sebastian (Florida) | 4,198.67 mi (6,757.11 km) |
| Rhondda to Sebring (Florida) | 4,255.03 mi (6,847.81 km) |
| Rhondda to Secaucus (New Jersey) | 3,323.58 mi (5,348.78 km) |
