| Harrow to Granada | 1,007.95 mi (1,622.14 km) |
| Harrow to Granadilla de Abona | 1,826.56 mi (2,939.57 km) |
| Harrow to Granollers | 700.37 mi (1,127.13 km) |
| Harrow to Grinon | 802.99 mi (1,292.29 km) |
| Harrow to Guadalajara | 768.38 mi (1,236.59 km) |
| Harrow to Guadarrama | 774.60 mi (1,246.60 km) |
| Harrow to Guadix | 996.24 mi (1,603.29 km) |
| Harrow to Guardamar del Segura | 932.46 mi (1,500.65 km) |
| Harrow to Guernica y Luno | 581.30 mi (935.52 km) |
| Harrow to Guia de Isora | 1,825.24 mi (2,937.43 km) |
| Harrow to Guillena | 1,009.79 mi (1,625.10 km) |
| Harrow to Guimar | 1,809.83 mi (2,912.64 km) |
| Harrow to Hellin | 905.15 mi (1,456.70 km) |
| Harrow to Herencia | 856.39 mi (1,378.23 km) |
| Harrow to Hernani | 579.57 mi (932.73 km) |
