| Rhondda to Bicaz | 1,359.54 mi (2,187.97 km) |
| Rhondda to Bistrita | 1,284.97 mi (2,067.96 km) |
| Rhondda to Blaj | 1,288.53 mi (2,073.69 km) |
| Rhondda to Bocsa | 1,221.24 mi (1,965.39 km) |
| Rhondda to Boldesti-Scaeni | 1,416.02 mi (2,278.87 km) |
| Rhondda to Bolintin Vale | 1,424.58 mi (2,292.64 km) |
| Rhondda to Borsa | 1,277.55 mi (2,056.02 km) |
| Rhondda to Botosani | 1,361.13 mi (2,190.53 km) |
| Rhondda to Brad | 1,242.08 mi (1,998.93 km) |
| Rhondda to Bragadiru | 1,436.52 mi (2,311.86 km) |
| Rhondda to Braila | 1,490.30 mi (2,398.41 km) |
| Rhondda to Brasov | 1,377.34 mi (2,216.62 km) |
| Rhondda to Breaza | 1,395.07 mi (2,245.15 km) |
| Rhondda to Bucharest | 1,439.81 mi (2,317.15 km) |
| Rhondda to Buftea | 1,428.45 mi (2,298.87 km) |
