| Harrow Weald to Ayamonte | 1,053.27 mi (1,695.08 km) |
| Harrow Weald to Azcoitia | 589.30 mi (948.38 km) |
| Harrow Weald to Azpeitia | 588.79 mi (947.56 km) |
| Harrow Weald to Azuqueca de Henares | 775.38 mi (1,247.86 km) |
| Harrow Weald to Badajoz | 935.57 mi (1,505.65 km) |
| Harrow Weald to Badalona | 713.17 mi (1,147.74 km) |
| Harrow Weald to Baena | 985.65 mi (1,586.25 km) |
| Harrow Weald to Baeza | 953.28 mi (1,534.16 km) |
| Harrow Weald to Bailen | 948.89 mi (1,527.08 km) |
| Harrow Weald to Balaguer | 680.20 mi (1,094.67 km) |
| Harrow Weald to Banolas | 671.38 mi (1,080.48 km) |
| Harrow Weald to Baranain | 611.45 mi (984.04 km) |
| Harrow Weald to Barbadanes | 734.34 mi (1,181.81 km) |
| Harrow Weald to Barbastro | 661.44 mi (1,064.49 km) |
| Harrow Weald to Barcelona | 716.19 mi (1,152.59 km) |
