| Barstow to Mauldin (South Carolina) | 1,960.58 mi (3,155.25 km) |
| Barstow to Maumee (Ohio) | 1,857.87 mi (2,989.95 km) |
| Barstow to Maumelle (Arkansas) | 1,393.81 mi (2,243.12 km) |
| Barstow to Mayagüez (Puerto Rico) | 3,255.31 mi (5,238.92 km) |
| Barstow to Mayfield Heights (Ohio) | 1,971.89 mi (3,173.45 km) |
| Barstow to Mays Chapel (Maryland) | 2,228.17 mi (3,585.89 km) |
| Barstow to Maywood (California) | 88.89 mi (143.05 km) |
| Barstow to Maywood (Illinois) | 1,645.29 mi (2,647.84 km) |
| Barstow to McAlester (Oklahoma) | 1,203.30 mi (1,936.52 km) |
| Barstow to McAllen (Texas) | 1,264.98 mi (2,035.79 km) |
| Barstow to McCalla (Alabama) | 1,714.69 mi (2,759.53 km) |
| Barstow to McComb (Mississippi) | 1,554.52 mi (2,501.76 km) |
| Barstow to McDonough (Georgia) | 1,875.11 mi (3,017.69 km) |
| Barstow to McFarland (California) | 135.89 mi (218.69 km) |
| Barstow to McHenry (Illinois) | 1,627.03 mi (2,618.45 km) |
