| Swansea to Bicaz | 5,339.16 mi (8,592.55 km) |
| Swansea to Bistrita | 5,274.16 mi (8,487.94 km) |
| Swansea to Blaj | 5,298.77 mi (8,527.55 km) |
| Swansea to Bocsa | 5,257.09 mi (8,460.47 km) |
| Swansea to Boldesti-Scaeni | 5,427.43 mi (8,734.60 km) |
| Swansea to Bolintin Vale | 5,445.86 mi (8,764.27 km) |
| Swansea to Borsa | 5,255.19 mi (8,457.41 km) |
| Swansea to Botosani | 5,318.38 mi (8,559.11 km) |
| Swansea to Brad | 5,261.15 mi (8,467.00 km) |
| Swansea to Bragadiru | 5,457.25 mi (8,782.60 km) |
| Swansea to Braila | 5,482.48 mi (8,823.21 km) |
| Swansea to Brasov | 5,382.43 mi (8,662.18 km) |
| Swansea to Breaza | 5,406.98 mi (8,701.70 km) |
| Swansea to Bucharest | 5,458.83 mi (8,785.14 km) |
| Swansea to Buftea | 5,446.77 mi (8,765.73 km) |
