| Shannon to McKeesport (Pennsylvania) | 3,335.49 mi (5,367.95 km) |
| Shannon to McKinleyville (California) | 4,901.75 mi (7,888.60 km) |
| Shannon to McKinney (Texas) | 4,347.76 mi (6,997.04 km) |
| Shannon to McLean (Virginia) | 3,289.89 mi (5,294.57 km) |
| Shannon to McMinnville (Oregon) | 4,637.25 mi (7,462.94 km) |
| Shannon to McMinnville (Tennessee) | 3,790.64 mi (6,100.44 km) |
| Shannon to McNair (Virginia) | 3,298.44 mi (5,308.33 km) |
| Shannon to McPherson (Kansas) | 4,127.75 mi (6,642.98 km) |
| Shannon to Mead Valley (California) | 5,078.40 mi (8,172.89 km) |
| Shannon to Meadow Woods (Florida) | 3,967.09 mi (6,384.41 km) |
| Shannon to Meadowbrook (Virginia) | 3,369.82 mi (5,423.20 km) |
| Shannon to Meadville (Pennsylvania) | 3,290.33 mi (5,295.28 km) |
| Shannon to Mebane (North Carolina) | 3,506.02 mi (5,642.39 km) |
| Shannon to Mechanicsville (Virginia) | 3,356.01 mi (5,400.98 km) |
| Shannon to Medford (Massachusetts) | 2,890.85 mi (4,652.37 km) |
