| Holyhead to Merrick (New York) | 3,228.80 mi (5,196.26 km) |
| Holyhead to Merrifield (Virginia) | 3,457.27 mi (5,563.94 km) |
| Holyhead to Merrillville (Indiana) | 3,729.80 mi (6,002.53 km) |
| Holyhead to Merritt Island (Florida) | 4,112.39 mi (6,618.26 km) |
| Holyhead to Mesa (Arizona) | 5,033.40 mi (8,100.47 km) |
| Holyhead to Mesquite (Nevada) | 4,926.09 mi (7,927.77 km) |
| Holyhead to Mesquite (Texas) | 4,516.52 mi (7,268.63 km) |
| Holyhead to Metairie (Louisiana) | 4,409.94 mi (7,097.11 km) |
| Holyhead to Methuen Town (Massachusetts) | 3,043.46 mi (4,897.97 km) |
| Holyhead to Metuchen (New Jersey) | 3,266.12 mi (5,256.31 km) |
| Holyhead to Mexico (Missouri) | 4,013.00 mi (6,458.31 km) |
| Holyhead to Miami (Florida) | 4,223.77 mi (6,797.49 km) |
| Holyhead to Miami (Oklahoma) | 4,239.42 mi (6,822.69 km) |
| Holyhead to Miami Beach (Florida) | 4,219.15 mi (6,790.07 km) |
| Holyhead to Miami Gardens (Florida) | 4,216.84 mi (6,786.36 km) |
