| Holyhead to Mountain Brook (Alabama) | 4,095.76 mi (6,591.49 km) |
| Holyhead to Mountain Home (Arkansas) | 4,172.96 mi (6,715.74 km) |
| Holyhead to Mountain Home (Idaho) | 4,625.90 mi (7,444.67 km) |
| Holyhead to Mountain House (California) | 5,105.95 mi (8,217.23 km) |
| Holyhead to Mountain Park (Georgia) | 3,974.01 mi (6,395.55 km) |
| Holyhead to Mountain Top (Pennsylvania) | 3,301.20 mi (5,312.78 km) |
| Holyhead to Mountain View (California) | 5,143.27 mi (8,277.30 km) |
| Holyhead to Mountlake Terrace (Washington) | 4,556.77 mi (7,333.42 km) |
| Holyhead to Mukilteo (Washington) | 4,550.05 mi (7,322.59 km) |
| Holyhead to Muncie (Indiana) | 3,716.14 mi (5,980.55 km) |
| Holyhead to Mundelein (Illinois) | 3,718.50 mi (5,984.35 km) |
| Holyhead to Munhall (Pennsylvania) | 3,492.88 mi (5,621.24 km) |
| Holyhead to Munster (Indiana) | 3,733.31 mi (6,008.18 km) |
| Holyhead to Murfreesboro (Tennessee) | 3,965.50 mi (6,381.86 km) |
| Holyhead to Murphy (Texas) | 4,503.98 mi (7,248.45 km) |
