| Watford to Mansfield | 108.30 mi (174.29 km) |
| Watford to March | 65.22 mi (104.96 km) |
| Watford to Margate | 78.74 mi (126.73 km) |
| Watford to Market Drayton | 123.48 mi (198.73 km) |
| Watford to Market Harborough | 61.05 mi (98.24 km) |
| Watford to Marlow | 17.50 mi (28.17 km) |
| Watford to Marple | 139.23 mi (224.07 km) |
| Watford to Marton | 201.95 mi (325.00 km) |
| Watford to Maryport | 247.08 mi (397.64 km) |
| Watford to Matlock | 113.56 mi (182.75 km) |
| Watford to Melksham | 77.44 mi (124.63 km) |
| Watford to Meltham | 147.07 mi (236.69 km) |
| Watford to Melton Mowbray | 79.53 mi (127.98 km) |
| Watford to Merthyr Tudful | 127.85 mi (205.75 km) |
| Watford to Methil | 330.64 mi (532.11 km) |
