| Holyhead to Marshall (Minnesota) | 3,899.12 mi (6,275.03 km) |
| Holyhead to Marshall (Missouri) | 4,065.29 mi (6,542.45 km) |
| Holyhead to Marshall (Texas) | 4,442.28 mi (7,149.15 km) |
| Holyhead to Marshalltown (Iowa) | 3,911.63 mi (6,295.16 km) |
| Holyhead to Marshfield (Wisconsin) | 3,687.20 mi (5,933.97 km) |
| Holyhead to Martha Lake (Washington) | 4,551.62 mi (7,325.12 km) |
| Holyhead to Martin (Tennessee) | 4,036.67 mi (6,496.39 km) |
| Holyhead to Martinez (California) | 5,109.87 mi (8,223.54 km) |
| Holyhead to Martinez (Georgia) | 3,908.54 mi (6,290.19 km) |
| Holyhead to Martinsburg (West Virginia) | 3,459.65 mi (5,567.77 km) |
| Holyhead to Martinsville (Indiana) | 3,793.33 mi (6,104.78 km) |
| Holyhead to Martinsville (New Jersey) | 3,271.91 mi (5,265.64 km) |
| Holyhead to Martinsville (Virginia) | 3,665.11 mi (5,898.42 km) |
| Holyhead to Maryland City (Maryland) | 3,429.23 mi (5,518.82 km) |
| Holyhead to Maryland Heights (Missouri) | 3,981.91 mi (6,408.26 km) |
