| Glastonbury to Mauldin (South Carolina) | 3,972.58 mi (6,393.25 km) |
| Glastonbury to Maumee (Ohio) | 3,717.42 mi (5,982.61 km) |
| Glastonbury to Maumelle (Arkansas) | 4,380.07 mi (7,049.03 km) |
| Glastonbury to Mayagüez (Puerto Rico) | 4,143.36 mi (6,668.09 km) |
| Glastonbury to Mayfield Heights (Ohio) | 3,631.56 mi (5,844.43 km) |
| Glastonbury to Mays Chapel (Maryland) | 3,526.79 mi (5,675.82 km) |
| Glastonbury to Maywood (California) | 5,374.14 mi (8,648.84 km) |
| Glastonbury to Maywood (Illinois) | 3,867.59 mi (6,224.28 km) |
| Glastonbury to McAlester (Oklahoma) | 4,509.43 mi (7,257.23 km) |
| Glastonbury to McAllen (Texas) | 5,054.10 mi (8,133.79 km) |
| Glastonbury to McCalla (Alabama) | 4,238.61 mi (6,821.39 km) |
| Glastonbury to McComb (Mississippi) | 4,480.98 mi (7,211.45 km) |
| Glastonbury to McDonough (Georgia) | 4,113.08 mi (6,619.36 km) |
| Glastonbury to McFarland (California) | 5,313.39 mi (8,551.08 km) |
| Glastonbury to McHenry (Illinois) | 3,864.15 mi (6,218.75 km) |
