| Llantrisant to Marysville (California) | 5,150.75 mi (8,289.34 km) |
| Llantrisant to Marysville (Ohio) | 3,728.48 mi (6,000.41 km) |
| Llantrisant to Marysville (Washington) | 4,664.08 mi (7,506.11 km) |
| Llantrisant to Maryville (Missouri) | 4,170.44 mi (6,711.68 km) |
| Llantrisant to Maryville (Tennessee) | 3,960.75 mi (6,374.21 km) |
| Llantrisant to Mason (Ohio) | 3,805.76 mi (6,124.77 km) |
| Llantrisant to Mason City (Iowa) | 3,974.64 mi (6,396.57 km) |
| Llantrisant to Massapequa (New York) | 3,307.01 mi (5,322.13 km) |
| Llantrisant to Massapequa Park (New York) | 3,305.55 mi (5,319.77 km) |
| Llantrisant to Massillon (Ohio) | 3,630.18 mi (5,842.22 km) |
| Llantrisant to Mastic (New York) | 3,275.25 mi (5,271.00 km) |
| Llantrisant to Mastic Beach (New York) | 3,276.62 mi (5,273.21 km) |
| Llantrisant to Matteson (Illinois) | 3,843.12 mi (6,184.90 km) |
| Llantrisant to Matthews (North Carolina) | 3,855.71 mi (6,205.17 km) |
| Llantrisant to Mattoon (Illinois) | 3,961.13 mi (6,374.82 km) |
