| Shannon to Mauldin (South Carolina) | 3,692.05 mi (5,941.78 km) |
| Shannon to Maumee (Ohio) | 3,433.96 mi (5,526.42 km) |
| Shannon to Maumelle (Arkansas) | 4,096.64 mi (6,592.90 km) |
| Shannon to Mayagüez (Puerto Rico) | 3,907.49 mi (6,288.49 km) |
| Shannon to Mayfield Heights (Ohio) | 3,348.32 mi (5,388.60 km) |
| Shannon to Mays Chapel (Maryland) | 3,245.82 mi (5,223.64 km) |
| Shannon to Maywood (California) | 5,100.70 mi (8,208.79 km) |
| Shannon to Maywood (Illinois) | 3,584.20 mi (5,768.21 km) |
| Shannon to McAlester (Oklahoma) | 4,225.95 mi (6,801.00 km) |
| Shannon to McAllen (Texas) | 4,771.19 mi (7,678.49 km) |
| Shannon to McCalla (Alabama) | 3,956.83 mi (6,367.90 km) |
| Shannon to McComb (Mississippi) | 4,198.82 mi (6,757.35 km) |
| Shannon to McDonough (Georgia) | 3,832.47 mi (6,167.76 km) |
| Shannon to McFarland (California) | 5,042.37 mi (8,114.92 km) |
| Shannon to McHenry (Illinois) | 3,580.88 mi (5,762.87 km) |
