| Llantwit Major to Mitchell (South Dakota) | 4,125.23 mi (6,638.92 km) |
| Llantwit Major to Mitchellville (Maryland) | 3,518.77 mi (5,662.91 km) |
| Llantwit Major to Moberly (Missouri) | 4,122.61 mi (6,634.69 km) |
| Llantwit Major to Mobile (Alabama) | 4,375.54 mi (7,041.75 km) |
| Llantwit Major to Modesto (California) | 5,222.26 mi (8,404.42 km) |
| Llantwit Major to Mokena (Illinois) | 3,847.32 mi (6,191.66 km) |
| Llantwit Major to Moline (Illinois) | 3,950.61 mi (6,357.89 km) |
| Llantwit Major to Moncks Corner (South Carolina) | 3,916.59 mi (6,303.15 km) |
| Llantwit Major to Monfort Heights (Ohio) | 3,825.40 mi (6,156.39 km) |
| Llantwit Major to Monmouth (Oregon) | 4,879.70 mi (7,853.12 km) |
| Llantwit Major to Monroe (Georgia) | 4,041.27 mi (6,503.79 km) |
| Llantwit Major to Monroe (Louisiana) | 4,445.64 mi (7,154.57 km) |
| Llantwit Major to Monroe (Michigan) | 3,653.83 mi (5,880.27 km) |
| Llantwit Major to Monroe (North Carolina) | 3,853.06 mi (6,200.91 km) |
| Llantwit Major to Monroe (Ohio) | 3,803.70 mi (6,121.46 km) |
