| Rhondda to Brownsburg (Indiana) | 3,862.94 mi (6,216.80 km) |
| Rhondda to Brownsville (Florida) | 4,286.65 mi (6,898.70 km) |
| Rhondda to Brownsville (Texas) | 4,994.47 mi (8,037.82 km) |
| Rhondda to Brownwood (Texas) | 4,756.80 mi (7,655.33 km) |
| Rhondda to Brunswick (Georgia) | 4,074.87 mi (6,557.88 km) |
| Rhondda to Brunswick (Ohio) | 3,617.91 mi (5,822.47 km) |
| Rhondda to Brushy Creek (Texas) | 4,770.32 mi (7,677.09 km) |
| Rhondda to Bryan (Texas) | 4,708.72 mi (7,577.95 km) |
| Rhondda to Bryant (Arkansas) | 4,354.86 mi (7,008.47 km) |
| Rhondda to Bryn Mawr-Skyway (Washington) | 4,694.03 mi (7,554.32 km) |
| Rhondda to Buckeye (Arizona) | 5,172.12 mi (8,323.73 km) |
| Rhondda to Buckhall (Virginia) | 3,552.59 mi (5,717.34 km) |
| Rhondda to Bucyrus (Ohio) | 3,683.48 mi (5,927.98 km) |
| Rhondda to Buda (Texas) | 4,797.30 mi (7,720.51 km) |
| Rhondda to Buena Park (California) | 5,331.49 mi (8,580.21 km) |
