| Welwyn Garden City to Bicaz | 1,222.72 mi (1,967.77 km) |
| Welwyn Garden City to Bistrita | 1,148.49 mi (1,848.31 km) |
| Welwyn Garden City to Blaj | 1,153.75 mi (1,856.78 km) |
| Welwyn Garden City to Bocsa | 1,089.73 mi (1,753.76 km) |
| Welwyn Garden City to Boldesti-Scaeni | 1,281.77 mi (2,062.81 km) |
| Welwyn Garden City to Bolintin Vale | 1,291.48 mi (2,078.43 km) |
| Welwyn Garden City to Borsa | 1,140.39 mi (1,835.28 km) |
| Welwyn Garden City to Botosani | 1,223.35 mi (1,968.79 km) |
| Welwyn Garden City to Brad | 1,108.10 mi (1,783.32 km) |
| Welwyn Garden City to Bragadiru | 1,303.38 mi (2,097.59 km) |
| Welwyn Garden City to Braila | 1,354.63 mi (2,180.07 km) |
| Welwyn Garden City to Brasov | 1,242.36 mi (1,999.39 km) |
| Welwyn Garden City to Breaza | 1,260.80 mi (2,029.07 km) |
| Welwyn Garden City to Bucharest | 1,306.47 mi (2,102.56 km) |
| Welwyn Garden City to Buftea | 1,294.99 mi (2,084.09 km) |
