| Key West to Merrick (New York) | 1,208.77 mi (1,945.32 km) |
| Key West to Merrifield (Virginia) | 1,023.55 mi (1,647.25 km) |
| Key West to Merrillville (Indiana) | 1,210.88 mi (1,948.72 km) |
| Key West to Merritt Island (Florida) | 267.97 mi (431.25 km) |
| Key West to Mesa (Arizona) | 1,901.87 mi (3,060.77 km) |
| Key West to Mesquite (Nevada) | 2,087.13 mi (3,358.92 km) |
| Key West to Mesquite (Texas) | 1,059.77 mi (1,705.54 km) |
| Key West to Metairie (Louisiana) | 637.64 mi (1,026.19 km) |
| Key West to Methuen Town (Massachusetts) | 1,392.61 mi (2,241.18 km) |
| Key West to Metuchen (New Jersey) | 1,184.26 mi (1,905.89 km) |
| Key West to Mexico (Missouri) | 1,167.83 mi (1,879.45 km) |
| Key West to Miami (Florida) | 129.26 mi (208.03 km) |
| Key West to Miami (Oklahoma) | 1,150.78 mi (1,852.00 km) |
| Key West to Miami Beach (Florida) | 134.09 mi (215.80 km) |
| Key West to Miami Gardens (Florida) | 135.20 mi (217.58 km) |
