| Rhondda to Black Forest (Colorado) | 4,590.06 mi (7,386.99 km) |
| Rhondda to Blackfoot (Idaho) | 4,633.72 mi (7,457.25 km) |
| Rhondda to Blackhawk (California) | 5,231.88 mi (8,419.89 km) |
| Rhondda to Blacksburg (Virginia) | 3,742.80 mi (6,023.46 km) |
| Rhondda to Blackwells Mills (New Jersey) | 3,358.46 mi (5,404.93 km) |
| Rhondda to Blaine (Minnesota) | 3,877.22 mi (6,239.78 km) |
| Rhondda to Bloomingdale (Florida) | 4,269.21 mi (6,870.62 km) |
| Rhondda to Bloomingdale (Illinois) | 3,832.41 mi (6,167.66 km) |
| Rhondda to Bloomington (California) | 5,300.00 mi (8,529.52 km) |
| Rhondda to Bloomington (Illinois) | 3,934.48 mi (6,331.93 km) |
| Rhondda to Bloomington (Indiana) | 3,899.62 mi (6,275.83 km) |
| Rhondda to Bloomington (Minnesota) | 3,896.71 mi (6,271.16 km) |
| Rhondda to Bloomsburg (Pennsylvania) | 3,412.06 mi (5,491.18 km) |
| Rhondda to Blue Ash (Ohio) | 3,810.42 mi (6,132.28 km) |
| Rhondda to Blue Island (Illinois) | 3,829.95 mi (6,163.72 km) |
