| Holyhead to Marysville (California) | 5,027.61 mi (8,091.15 km) |
| Holyhead to Marysville (Ohio) | 3,635.93 mi (5,851.46 km) |
| Holyhead to Marysville (Washington) | 4,536.45 mi (7,300.71 km) |
| Holyhead to Maryville (Missouri) | 4,066.46 mi (6,544.33 km) |
| Holyhead to Maryville (Tennessee) | 3,874.39 mi (6,235.23 km) |
| Holyhead to Mason (Ohio) | 3,713.54 mi (5,976.36 km) |
| Holyhead to Mason City (Iowa) | 3,868.72 mi (6,226.11 km) |
| Holyhead to Massapequa (New York) | 3,224.76 mi (5,189.75 km) |
| Holyhead to Massapequa Park (New York) | 3,223.29 mi (5,187.39 km) |
| Holyhead to Massillon (Ohio) | 3,538.69 mi (5,694.97 km) |
| Holyhead to Mastic (New York) | 3,193.46 mi (5,139.37 km) |
| Holyhead to Mastic Beach (New York) | 3,194.93 mi (5,141.74 km) |
| Holyhead to Matteson (Illinois) | 3,744.26 mi (6,025.80 km) |
| Holyhead to Matthews (North Carolina) | 3,774.36 mi (6,074.24 km) |
| Holyhead to Mattoon (Illinois) | 3,864.50 mi (6,219.31 km) |
