| Rhondda to Bonita (California) | 5,365.83 mi (8,635.47 km) |
| Rhondda to Bonita Springs (Florida) | 4,325.37 mi (6,961.01 km) |
| Rhondda to Bonney Lake (Washington) | 4,709.75 mi (7,579.61 km) |
| Rhondda to Boone (Iowa) | 4,047.29 mi (6,513.48 km) |
| Rhondda to Boone (North Carolina) | 3,840.92 mi (6,181.36 km) |
| Rhondda to Borger (Texas) | 4,645.71 mi (7,476.55 km) |
| Rhondda to Bossier City (Louisiana) | 4,506.20 mi (7,252.02 km) |
| Rhondda to Boston (Massachusetts) | 3,136.59 mi (5,047.85 km) |
| Rhondda to Bostonia (California) | 5,354.43 mi (8,617.13 km) |
| Rhondda to Bothell (Washington) | 4,677.46 mi (7,527.64 km) |
| Rhondda to Bothell East (Washington) | 4,675.07 mi (7,523.80 km) |
| Rhondda to Bothell West (Washington) | 4,676.64 mi (7,526.32 km) |
| Rhondda to Boulder (Colorado) | 4,560.75 mi (7,339.82 km) |
| Rhondda to Boulder City (Nevada) | 5,117.87 mi (8,236.41 km) |
| Rhondda to Bound Brook (New Jersey) | 3,352.15 mi (5,394.76 km) |
