| Watford to Mauldin (South Carolina) | 4,057.56 mi (6,530.02 km) |
| Watford to Maumee (Ohio) | 3,794.17 mi (6,106.12 km) |
| Watford to Maumelle (Arkansas) | 4,457.07 mi (7,172.96 km) |
| Watford to Mayagüez (Puerto Rico) | 4,246.95 mi (6,834.81 km) |
| Watford to Mayfield Heights (Ohio) | 3,710.03 mi (5,970.72 km) |
| Watford to Mays Chapel (Maryland) | 3,611.12 mi (5,811.54 km) |
| Watford to Maywood (California) | 5,426.95 mi (8,733.83 km) |
| Watford to Maywood (Illinois) | 3,940.71 mi (6,341.97 km) |
| Watford to McAlester (Oklahoma) | 4,583.49 mi (7,376.42 km) |
| Watford to McAllen (Texas) | 5,133.81 mi (8,262.07 km) |
| Watford to McCalla (Alabama) | 4,321.41 mi (6,954.64 km) |
| Watford to McComb (Mississippi) | 4,562.93 mi (7,343.32 km) |
| Watford to McDonough (Georgia) | 4,197.94 mi (6,755.93 km) |
| Watford to McFarland (California) | 5,363.45 mi (8,631.63 km) |
| Watford to McHenry (Illinois) | 3,936.37 mi (6,334.97 km) |
