| Rhondda to Ukiah (California) | 5,195.23 mi (8,360.91 km) |
| Rhondda to Union (Missouri) | 4,109.39 mi (6,613.42 km) |
| Rhondda to Union City (California) | 5,247.44 mi (8,444.94 km) |
| Rhondda to Union City (Georgia) | 4,084.37 mi (6,573.17 km) |
| Rhondda to Union City (New Jersey) | 3,322.77 mi (5,347.48 km) |
| Rhondda to Union City (Tennessee) | 4,129.47 mi (6,645.74 km) |
| Rhondda to Union Hill-Novelty Hill (Washington) | 4,677.93 mi (7,528.40 km) |
| Rhondda to Union Park (Florida) | 4,191.63 mi (6,745.78 km) |
| Rhondda to Uniondale (New York) | 3,306.86 mi (5,321.87 km) |
| Rhondda to Universal City (Texas) | 4,842.63 mi (7,793.47 km) |
| Rhondda to University (Florida) | 4,266.51 mi (6,866.29 km) |
| Rhondda to University City (Missouri) | 4,072.80 mi (6,554.53 km) |
| Rhondda to University Heights (Ohio) | 3,595.59 mi (5,786.55 km) |
| Rhondda to University of California-Santa Barbara (California) | 5,360.76 mi (8,627.31 km) |
| Rhondda to University Park (Texas) | 4,613.08 mi (7,424.03 km) |
