| Harpenden to Bicaz | 1,229.56 mi (1,978.79 km) |
| Harpenden to Bistrita | 1,155.33 mi (1,859.33 km) |
| Harpenden to Blaj | 1,160.58 mi (1,867.77 km) |
| Harpenden to Bocsa | 1,096.50 mi (1,764.65 km) |
| Harpenden to Boldesti-Scaeni | 1,288.60 mi (2,073.79 km) |
| Harpenden to Bolintin Vale | 1,298.28 mi (2,089.38 km) |
| Harpenden to Borsa | 1,147.23 mi (1,846.29 km) |
| Harpenden to Botosani | 1,230.18 mi (1,979.78 km) |
| Harpenden to Brad | 1,114.92 mi (1,794.30 km) |
| Harpenden to Bragadiru | 1,310.19 mi (2,108.54 km) |
| Harpenden to Braila | 1,361.48 mi (2,191.08 km) |
| Harpenden to Brasov | 1,249.20 mi (2,010.39 km) |
| Harpenden to Breaza | 1,267.63 mi (2,040.05 km) |
| Harpenden to Bucharest | 1,313.28 mi (2,113.52 km) |
| Harpenden to Buftea | 1,301.80 mi (2,095.05 km) |
