| Llantrisant to Mitchell (South Dakota) | 4,123.65 mi (6,636.37 km) |
| Llantrisant to Mitchellville (Maryland) | 3,520.27 mi (5,665.33 km) |
| Llantrisant to Moberly (Missouri) | 4,122.27 mi (6,634.15 km) |
| Llantrisant to Mobile (Alabama) | 4,376.98 mi (7,044.07 km) |
| Llantrisant to Modesto (California) | 5,218.92 mi (8,399.04 km) |
| Llantrisant to Mokena (Illinois) | 3,847.15 mi (6,191.39 km) |
| Llantrisant to Moline (Illinois) | 3,950.17 mi (6,357.18 km) |
| Llantrisant to Moncks Corner (South Carolina) | 3,918.67 mi (6,306.48 km) |
| Llantrisant to Monfort Heights (Ohio) | 3,825.98 mi (6,157.33 km) |
| Llantrisant to Monmouth (Oregon) | 4,875.39 mi (7,846.19 km) |
| Llantrisant to Monroe (Georgia) | 4,042.79 mi (6,506.25 km) |
| Llantrisant to Monroe (Louisiana) | 4,446.34 mi (7,155.70 km) |
| Llantrisant to Monroe (Michigan) | 3,654.08 mi (5,880.68 km) |
| Llantrisant to Monroe (North Carolina) | 3,854.78 mi (6,203.67 km) |
| Llantrisant to Monroe (Ohio) | 3,804.26 mi (6,122.36 km) |
