| Harrow to Bicaz | 1,227.86 mi (1,976.04 km) |
| Harrow to Bistrita | 1,153.38 mi (1,856.18 km) |
| Harrow to Blaj | 1,157.62 mi (1,863.02 km) |
| Harrow to Bocsa | 1,092.12 mi (1,757.59 km) |
| Harrow to Boldesti-Scaeni | 1,285.39 mi (2,068.63 km) |
| Harrow to Bolintin Vale | 1,294.56 mi (2,083.39 km) |
| Harrow to Borsa | 1,145.79 mi (1,843.97 km) |
| Harrow to Botosani | 1,229.32 mi (1,978.41 km) |
| Harrow to Brad | 1,111.57 mi (1,788.89 km) |
| Harrow to Bragadiru | 1,306.48 mi (2,102.57 km) |
| Harrow to Braila | 1,359.02 mi (2,187.12 km) |
| Harrow to Brasov | 1,246.35 mi (2,005.81 km) |
| Harrow to Breaza | 1,264.42 mi (2,034.89 km) |
| Harrow to Bucharest | 1,309.66 mi (2,107.69 km) |
| Harrow to Buftea | 1,298.23 mi (2,089.30 km) |
