| Barrow in Furness to Mauldin (South Carolina) | 3,896.86 mi (6,271.40 km) |
| Barrow in Furness to Maumee (Ohio) | 3,619.12 mi (5,824.42 km) |
| Barrow in Furness to Maumelle (Arkansas) | 4,281.83 mi (6,890.95 km) |
| Barrow in Furness to Mayagüez (Puerto Rico) | 4,155.09 mi (6,686.97 km) |
| Barrow in Furness to Mayfield Heights (Ohio) | 3,537.78 mi (5,693.51 km) |
| Barrow in Furness to Mays Chapel (Maryland) | 3,449.63 mi (5,551.65 km) |
| Barrow in Furness to Maywood (California) | 5,227.20 mi (8,412.36 km) |
| Barrow in Furness to Maywood (Illinois) | 3,760.39 mi (6,051.76 km) |
| Barrow in Furness to McAlester (Oklahoma) | 4,403.93 mi (7,087.45 km) |
| Barrow in Furness to McAllen (Texas) | 4,962.36 mi (7,986.14 km) |
| Barrow in Furness to McCalla (Alabama) | 4,156.11 mi (6,688.61 km) |
| Barrow in Furness to McComb (Mississippi) | 4,395.81 mi (7,074.37 km) |
| Barrow in Furness to McDonough (Georgia) | 4,036.82 mi (6,496.64 km) |
| Barrow in Furness to McFarland (California) | 5,162.21 mi (8,307.77 km) |
| Barrow in Furness to McHenry (Illinois) | 3,754.85 mi (6,042.85 km) |
