| Harrow to Luzzara | 681.52 mi (1,096.80 km) |
| Harrow to Luzzi | 1,157.03 mi (1,862.06 km) |
| Harrow to Macerata | 859.65 mi (1,383.48 km) |
| Harrow to Macerata Campania | 1,003.45 mi (1,614.90 km) |
| Harrow to Macomer | 895.03 mi (1,440.42 km) |
| Harrow to Maddaloni | 1,009.05 mi (1,623.91 km) |
| Harrow to Magenta | 596.74 mi (960.37 km) |
| Harrow to Magione | 825.04 mi (1,327.78 km) |
| Harrow to Maglie | 1,184.93 mi (1,906.97 km) |
| Harrow to Magnago | 588.22 mi (946.65 km) |
| Harrow to Malalbergo | 722.98 mi (1,163.53 km) |
| Harrow to Malnate | 579.60 mi (932.78 km) |
| Harrow to Malo | 673.69 mi (1,084.19 km) |
| Harrow to Mandello del Lario | 588.27 mi (946.73 km) |
| Harrow to Manduria | 1,152.76 mi (1,855.18 km) |
