| Key Largo to Monticello (Minnesota) | 1,580.79 mi (2,544.04 km) |
| Key Largo to Montrose (Colorado) | 1,846.31 mi (2,971.36 km) |
| Key Largo to Moody (Alabama) | 690.45 mi (1,111.17 km) |
| Key Largo to Moore (Oklahoma) | 1,235.96 mi (1,989.08 km) |
| Key Largo to Moorestown-Lenola (New Jersey) | 1,072.95 mi (1,726.75 km) |
| Key Largo to Mooresville (North Carolina) | 723.30 mi (1,164.03 km) |
| Key Largo to Moorhead (Minnesota) | 1,750.14 mi (2,816.58 km) |
| Key Largo to Moorpark (California) | 2,378.32 mi (3,827.54 km) |
| Key Largo to Moraga (California) | 2,585.39 mi (4,160.78 km) |
| Key Largo to Moreno Valley (California) | 2,280.77 mi (3,670.55 km) |
| Key Largo to Morgan City (Louisiana) | 732.59 mi (1,178.99 km) |
| Key Largo to Morgan Hill (California) | 2,553.07 mi (4,108.77 km) |
| Key Largo to Morganton (North Carolina) | 737.64 mi (1,187.12 km) |
| Key Largo to Morgantown (West Virginia) | 1,003.32 mi (1,614.68 km) |
| Key Largo to Morris (Illinois) | 1,213.36 mi (1,952.72 km) |
