| Harrow to Bitonto | 1,082.68 mi (1,742.40 km) |
| Harrow to Bitritto | 1,091.35 mi (1,756.36 km) |
| Harrow to Bollate | 599.93 mi (965.50 km) |
| Harrow to Bologna | 727.50 mi (1,170.80 km) |
| Harrow to Bolzano | 634.71 mi (1,021.47 km) |
| Harrow to Bomporto | 705.02 mi (1,134.63 km) |
| Harrow to Bonate di Sopra | 608.21 mi (978.82 km) |
| Harrow to Bondeno | 710.80 mi (1,143.92 km) |
| Harrow to Bordighera | 654.43 mi (1,053.20 km) |
| Harrow to Borgaro Torinese | 575.78 mi (926.63 km) |
| Harrow to Borgo a Buggiano | 738.83 mi (1,189.03 km) |
| Harrow to Borgo San Dalmazzo | 617.46 mi (993.71 km) |
| Harrow to Borgo San Lorenzo | 756.52 mi (1,217.50 km) |
| Harrow to Borgomanero | 571.20 mi (919.26 km) |
| Harrow to Borgoricco | 700.53 mi (1,127.40 km) |
