| Harrow to Montevarchi | 784.57 mi (1,262.64 km) |
| Harrow to Monticello Conte Otto | 682.81 mi (1,098.88 km) |
| Harrow to Montichiari | 649.43 mi (1,045.15 km) |
| Harrow to Montignoso | 713.75 mi (1,148.67 km) |
| Harrow to Montopoli in Val d'Arno | 750.87 mi (1,208.41 km) |
| Harrow to Monza | 603.39 mi (971.07 km) |
| Harrow to Morbegno | 586.38 mi (943.68 km) |
| Harrow to Mori | 649.70 mi (1,045.59 km) |
| Harrow to Morlupo | 888.54 mi (1,429.96 km) |
| Harrow to Morrovalle | 863.34 mi (1,389.41 km) |
| Harrow to Mortara | 603.70 mi (971.56 km) |
| Harrow to Mosciano Sant'Angelo | 902.28 mi (1,452.07 km) |
| Harrow to Motta di Livenza | 712.58 mi (1,146.79 km) |
| Harrow to Motta Sant'Anastasia | 1,225.83 mi (1,972.79 km) |
| Harrow to Mottola | 1,119.73 mi (1,802.03 km) |
