| Rhondda to Commerce City (Colorado) | 4,554.59 mi (7,329.91 km) |
| Rhondda to Compton (California) | 5,336.87 mi (8,588.86 km) |
| Rhondda to Comstock Park (Michigan) | 3,689.97 mi (5,938.43 km) |
| Rhondda to Concord (California) | 5,225.85 mi (8,410.20 km) |
| Rhondda to Concord (Missouri) | 4,081.16 mi (6,567.99 km) |
| Rhondda to Concord (New Hampshire) | 3,119.11 mi (5,019.73 km) |
| Rhondda to Concord (North Carolina) | 3,836.72 mi (6,174.61 km) |
| Rhondda to Conneaut (Ohio) | 3,538.08 mi (5,693.99 km) |
| Rhondda to Connersville (Indiana) | 3,821.82 mi (6,150.62 km) |
| Rhondda to Conroe (Texas) | 4,690.47 mi (7,548.58 km) |
| Rhondda to Converse (Texas) | 4,844.91 mi (7,797.13 km) |
| Rhondda to Conway (Arkansas) | 4,331.21 mi (6,970.41 km) |
| Rhondda to Conway (Florida) | 4,199.11 mi (6,757.82 km) |
| Rhondda to Conway (South Carolina) | 3,843.57 mi (6,185.63 km) |
| Rhondda to Conyers (Georgia) | 4,057.66 mi (6,530.17 km) |
