| Llantwit Major to Mountain Brook (Alabama) | 4,180.91 mi (6,728.53 km) |
| Llantwit Major to Mountain Home (Arkansas) | 4,269.46 mi (6,871.03 km) |
| Llantwit Major to Mountain Home (Idaho) | 4,751.20 mi (7,646.31 km) |
| Llantwit Major to Mountain House (California) | 5,231.77 mi (8,419.72 km) |
| Llantwit Major to Mountain Park (Georgia) | 4,056.20 mi (6,527.83 km) |
| Llantwit Major to Mountain Top (Pennsylvania) | 3,385.95 mi (5,449.16 km) |
| Llantwit Major to Mountain View (California) | 5,269.25 mi (8,480.05 km) |
| Llantwit Major to Mountlake Terrace (Washington) | 4,688.85 mi (7,545.98 km) |
| Llantwit Major to Mukilteo (Washington) | 4,682.18 mi (7,535.25 km) |
| Llantwit Major to Muncie (Indiana) | 3,810.45 mi (6,132.32 km) |
| Llantwit Major to Mundelein (Illinois) | 3,818.98 mi (6,146.06 km) |
| Llantwit Major to Munhall (Pennsylvania) | 3,581.07 mi (5,763.18 km) |
| Llantwit Major to Munster (Indiana) | 3,832.12 mi (6,167.20 km) |
| Llantwit Major to Murfreesboro (Tennessee) | 4,053.97 mi (6,524.23 km) |
| Llantwit Major to Murphy (Texas) | 4,601.02 mi (7,404.62 km) |
