| Middletown to Mattoon (Illinois) | 213.08 mi (342.93 km) |
| Middletown to Mauldin (South Carolina) | 345.39 mi (555.85 km) |
| Middletown to Maumee (Ohio) | 147.45 mi (237.30 km) |
| Middletown to Maumelle (Arkansas) | 546.33 mi (879.24 km) |
| Middletown to Mayagüez (Puerto Rico) | 1,796.44 mi (2,891.09 km) |
| Middletown to Mayfield Heights (Ohio) | 206.79 mi (332.80 km) |
| Middletown to Mays Chapel (Maryland) | 411.37 mi (662.03 km) |
| Middletown to Maywood (California) | 1,899.25 mi (3,056.54 km) |
| Middletown to Maywood (Illinois) | 245.25 mi (394.69 km) |
| Middletown to McAlester (Oklahoma) | 702.12 mi (1,129.96 km) |
| Middletown to McAllen (Texas) | 1,217.84 mi (1,959.92 km) |
| Middletown to McCalla (Alabama) | 453.28 mi (729.48 km) |
| Middletown to McComb (Mississippi) | 665.89 mi (1,071.65 km) |
| Middletown to McDonough (Georgia) | 419.12 mi (674.52 km) |
| Middletown to McFarland (California) | 1,915.50 mi (3,082.70 km) |
