| Harrow to Beocin | 1,016.94 mi (1,636.61 km) |
| Harrow to Blace | 1,155.66 mi (1,859.85 km) |
| Harrow to Bogatic | 1,020.78 mi (1,642.79 km) |
| Harrow to Bojnik | 1,184.61 mi (1,906.44 km) |
| Harrow to Boljevac | 1,160.74 mi (1,868.02 km) |
| Harrow to Bor | 1,154.85 mi (1,858.55 km) |
| Harrow to Borca | 1,058.71 mi (1,703.83 km) |
| Harrow to Bosilegrad | 1,236.64 mi (1,990.17 km) |
| Harrow to Brus | 1,141.72 mi (1,837.43 km) |
| Harrow to Bujanovac | 1,210.00 mi (1,947.31 km) |
| Harrow to Cacak | 1,093.33 mi (1,759.54 km) |
| Harrow to Cajetina | 1,073.92 mi (1,728.31 km) |
| Harrow to Cicevac | 1,144.74 mi (1,842.28 km) |
| Harrow to Coka | 1,007.60 mi (1,621.58 km) |
| Harrow to Crna Trava | 1,216.50 mi (1,957.76 km) |
