| Watford to Manerbio | 647.72 mi (1,042.41 km) |
| Watford to Manfredonia | 1,034.10 mi (1,664.23 km) |
| Watford to Maniago | 704.36 mi (1,133.56 km) |
| Watford to Mantova | 680.49 mi (1,095.15 km) |
| Watford to Maranello | 714.23 mi (1,149.44 km) |
| Watford to Marano di Napoli | 1,014.62 mi (1,632.87 km) |
| Watford to Marano Vicentino | 677.25 mi (1,089.93 km) |
| Watford to Marcianise | 1,011.16 mi (1,627.30 km) |
| Watford to Marcon | 715.38 mi (1,151.30 km) |
| Watford to Mareno di Piave | 704.60 mi (1,133.94 km) |
| Watford to Margherita di Savoia | 1,055.85 mi (1,699.23 km) |
| Watford to Mariano Comense | 599.32 mi (964.51 km) |
| Watford to Marigliano | 1,021.44 mi (1,643.84 km) |
| Watford to Marino | 919.08 mi (1,479.11 km) |
| Watford to Marostica | 683.20 mi (1,099.51 km) |
