| Castel Gandolfo to Mauldin (South Carolina) | 4,900.03 mi (7,885.83 km) |
| Castel Gandolfo to Maumee (Ohio) | 4,673.57 mi (7,521.38 km) |
| Castel Gandolfo to Maumelle (Arkansas) | 5,334.20 mi (8,584.56 km) |
| Castel Gandolfo to Mayagüez (Puerto Rico) | 4,872.02 mi (7,840.76 km) |
| Castel Gandolfo to Mayfield Heights (Ohio) | 4,583.43 mi (7,376.32 km) |
| Castel Gandolfo to Mays Chapel (Maryland) | 4,459.01 mi (7,176.09 km) |
| Castel Gandolfo to Maywood (California) | 6,346.37 mi (10,213.49 km) |
| Castel Gandolfo to Maywood (Illinois) | 4,831.13 mi (7,774.96 km) |
| Castel Gandolfo to McAlester (Oklahoma) | 5,470.27 mi (8,803.54 km) |
| Castel Gandolfo to McAllen (Texas) | 5,998.62 mi (9,653.85 km) |
| Castel Gandolfo to McCalla (Alabama) | 5,174.24 mi (8,327.14 km) |
| Castel Gandolfo to McComb (Mississippi) | 5,419.12 mi (8,721.24 km) |
| Castel Gandolfo to McDonough (Georgia) | 5,040.49 mi (8,111.88 km) |
| Castel Gandolfo to McFarland (California) | 6,283.13 mi (10,111.72 km) |
| Castel Gandolfo to McHenry (Illinois) | 4,829.28 mi (7,771.98 km) |
