| Watford to Montevarchi | 789.38 mi (1,270.39 km) |
| Watford to Monticello Conte Otto | 687.25 mi (1,106.03 km) |
| Watford to Montichiari | 654.08 mi (1,052.64 km) |
| Watford to Montignoso | 718.66 mi (1,156.57 km) |
| Watford to Montopoli in Val d'Arno | 755.76 mi (1,216.29 km) |
| Watford to Monza | 608.17 mi (978.76 km) |
| Watford to Morbegno | 590.99 mi (951.11 km) |
| Watford to Mori | 654.17 mi (1,052.79 km) |
| Watford to Morlupo | 893.42 mi (1,437.82 km) |
| Watford to Morrovalle | 867.95 mi (1,396.84 km) |
| Watford to Mortara | 608.61 mi (979.46 km) |
| Watford to Mosciano Sant'Angelo | 906.94 mi (1,459.57 km) |
| Watford to Motta di Livenza | 716.84 mi (1,153.64 km) |
| Watford to Motta Sant'Anastasia | 1,230.87 mi (1,980.89 km) |
| Watford to Mottola | 1,124.33 mi (1,809.43 km) |
