| Llantwit Major to Marysville (California) | 5,154.32 mi (8,295.07 km) |
| Llantwit Major to Marysville (Ohio) | 3,727.94 mi (5,999.53 km) |
| Llantwit Major to Marysville (Washington) | 4,668.61 mi (7,513.40 km) |
| Llantwit Major to Maryville (Missouri) | 4,171.19 mi (6,712.88 km) |
| Llantwit Major to Maryville (Tennessee) | 3,959.55 mi (6,372.28 km) |
| Llantwit Major to Mason (Ohio) | 3,805.17 mi (6,123.83 km) |
| Llantwit Major to Mason City (Iowa) | 3,975.63 mi (6,398.16 km) |
| Llantwit Major to Massapequa (New York) | 3,305.45 mi (5,319.61 km) |
| Llantwit Major to Massapequa Park (New York) | 3,303.98 mi (5,317.25 km) |
| Llantwit Major to Massillon (Ohio) | 3,629.53 mi (5,841.17 km) |
| Llantwit Major to Mastic (New York) | 3,273.64 mi (5,268.42 km) |
| Llantwit Major to Mastic Beach (New York) | 3,275.00 mi (5,270.61 km) |
| Llantwit Major to Matteson (Illinois) | 3,843.27 mi (6,185.14 km) |
| Llantwit Major to Matthews (North Carolina) | 3,854.03 mi (6,202.45 km) |
| Llantwit Major to Mattoon (Illinois) | 3,961.02 mi (6,374.64 km) |
