| Holyhead to Morristown (New Jersey) | 3,259.36 mi (5,245.43 km) |
| Holyhead to Morristown (Tennessee) | 3,825.19 mi (6,156.04 km) |
| Holyhead to Morrisville (North Carolina) | 3,664.24 mi (5,897.03 km) |
| Holyhead to Morro Bay (California) | 5,222.54 mi (8,404.86 km) |
| Holyhead to Morton (Illinois) | 3,851.88 mi (6,199.00 km) |
| Holyhead to Morton Grove (Illinois) | 3,720.81 mi (5,988.07 km) |
| Holyhead to Moscow (Idaho) | 4,467.36 mi (7,189.52 km) |
| Holyhead to Moses Lake (Washington) | 4,510.48 mi (7,258.92 km) |
| Holyhead to Moss Bluff (Louisiana) | 4,513.54 mi (7,263.83 km) |
| Holyhead to Moss Point (Mississippi) | 4,322.34 mi (6,956.13 km) |
| Holyhead to Moultrie (Georgia) | 4,093.96 mi (6,588.59 km) |
| Holyhead to Mounds View (Minnesota) | 3,776.01 mi (6,076.91 km) |
| Holyhead to Mount Airy (North Carolina) | 3,703.55 mi (5,960.28 km) |
| Holyhead to Mount Clemens (Michigan) | 3,508.47 mi (5,646.33 km) |
| Holyhead to Mount Dora (Florida) | 4,126.23 mi (6,640.52 km) |
