| Llantwit Major to Monticello (Minnesota) | 3,898.45 mi (6,273.95 km) |
| Llantwit Major to Montrose (Colorado) | 4,739.74 mi (7,627.88 km) |
| Llantwit Major to Moody (Alabama) | 4,165.51 mi (6,703.74 km) |
| Llantwit Major to Moore (Oklahoma) | 4,517.89 mi (7,270.85 km) |
| Llantwit Major to Moorestown-Lenola (New Jersey) | 3,397.28 mi (5,467.39 km) |
| Llantwit Major to Mooresville (North Carolina) | 3,837.14 mi (6,175.28 km) |
| Llantwit Major to Moorhead (Minnesota) | 3,931.67 mi (6,327.42 km) |
| Llantwit Major to Moorpark (California) | 5,343.53 mi (8,599.59 km) |
| Llantwit Major to Moraga (California) | 5,245.26 mi (8,441.43 km) |
| Llantwit Major to Moreno Valley (California) | 5,308.17 mi (8,542.67 km) |
| Llantwit Major to Morgan City (Louisiana) | 4,550.88 mi (7,323.93 km) |
| Llantwit Major to Morgan Hill (California) | 5,270.91 mi (8,482.72 km) |
| Llantwit Major to Morganton (North Carolina) | 3,866.03 mi (6,221.77 km) |
| Llantwit Major to Morgantown (West Virginia) | 3,616.32 mi (5,819.90 km) |
| Llantwit Major to Morris (Illinois) | 3,875.98 mi (6,237.79 km) |
