| Holyhead to Manor (Texas) | 4,678.49 mi (7,529.30 km) |
| Holyhead to Manorville (New York) | 3,189.08 mi (5,132.33 km) |
| Holyhead to Mansfield (Ohio) | 3,578.59 mi (5,759.18 km) |
| Holyhead to Mansfield (Texas) | 4,546.89 mi (7,317.51 km) |
| Holyhead to Manteca (California) | 5,094.83 mi (8,199.33 km) |
| Holyhead to Manville (New Jersey) | 3,275.20 mi (5,270.93 km) |
| Holyhead to Maple Grove (Minnesota) | 3,785.03 mi (6,091.41 km) |
| Holyhead to Maple Heights (Ohio) | 3,511.48 mi (5,651.18 km) |
| Holyhead to Maple Valley (Washington) | 4,573.45 mi (7,360.26 km) |
| Holyhead to Mapleton (Utah) | 4,660.02 mi (7,499.58 km) |
| Holyhead to Maplewood (Minnesota) | 3,775.26 mi (6,075.69 km) |
| Holyhead to Marana (Arizona) | 5,067.41 mi (8,155.21 km) |
| Holyhead to Marco Island (Florida) | 4,277.19 mi (6,883.47 km) |
| Holyhead to Margate (Florida) | 4,199.88 mi (6,759.06 km) |
| Holyhead to Maricopa (Arizona) | 5,063.17 mi (8,148.38 km) |
