| Rhondda to University Place (Washington) | 4,718.09 mi (7,593.03 km) |
| Rhondda to Upland (California) | 5,305.39 mi (8,538.20 km) |
| Rhondda to Upper Arlington (Ohio) | 3,722.43 mi (5,990.67 km) |
| Rhondda to Upper Grand Lagoon (Florida) | 4,300.92 mi (6,921.66 km) |
| Rhondda to Upper Montclair (New Jersey) | 3,326.47 mi (5,353.43 km) |
| Rhondda to Urbana (Illinois) | 3,921.37 mi (6,310.83 km) |
| Rhondda to Urbana (Maryland) | 3,521.45 mi (5,667.22 km) |
| Rhondda to Urbana (Ohio) | 3,746.05 mi (6,028.69 km) |
| Rhondda to Urbandale (Iowa) | 4,063.36 mi (6,539.34 km) |
| Rhondda to Utica (New York) | 3,273.78 mi (5,268.64 km) |
| Rhondda to Uvalde (Texas) | 4,918.22 mi (7,915.11 km) |
| Rhondda to Vacaville (California) | 5,202.74 mi (8,373.00 km) |
| Rhondda to Vadnais Heights (Minnesota) | 3,877.53 mi (6,240.29 km) |
| Rhondda to Vail (Arizona) | 5,180.06 mi (8,336.50 km) |
| Rhondda to Valdosta (Georgia) | 4,164.77 mi (6,702.54 km) |
