| Rhondda to San Luis Obispo (California) | 5,338.45 mi (8,591.41 km) |
| Rhondda to San Marcos (California) | 5,344.33 mi (8,600.87 km) |
| Rhondda to San Marcos (Texas) | 4,811.23 mi (7,742.93 km) |
| Rhondda to San Marino (California) | 5,320.16 mi (8,561.97 km) |
| Rhondda to San Mateo (California) | 5,259.39 mi (8,464.17 km) |
| Rhondda to San Pablo (California) | 5,236.82 mi (8,427.84 km) |
| Rhondda to San Rafael (California) | 5,240.71 mi (8,434.11 km) |
| Rhondda to San Ramon (California) | 5,235.84 mi (8,426.26 km) |
| Rhondda to San Tan Valley (Arizona) | 5,147.93 mi (8,284.80 km) |
| Rhondda to Sand Springs (Oklahoma) | 4,421.30 mi (7,115.39 km) |
| Rhondda to Sandusky (Ohio) | 3,644.17 mi (5,864.72 km) |
| Rhondda to Sandy (Oregon) | 4,812.45 mi (7,744.89 km) |
| Rhondda to Sandy (Utah) | 4,757.63 mi (7,656.67 km) |
| Rhondda to Sandy Springs (Georgia) | 4,059.94 mi (6,533.84 km) |
| Rhondda to Sanford (Florida) | 4,182.26 mi (6,730.70 km) |
