| Security-Widefield to McHenry (Illinois) | 895.51 mi (1,441.18 km) |
| Security-Widefield to McKeesport (Pennsylvania) | 1,325.25 mi (2,132.79 km) |
| Security-Widefield to McKinleyville (California) | 1,036.56 mi (1,668.18 km) |
| Security-Widefield to McKinney (Texas) | 590.63 mi (950.53 km) |
| Security-Widefield to McLean (Virginia) | 1,475.29 mi (2,374.25 km) |
| Security-Widefield to McMinnville (Oregon) | 1,045.60 mi (1,682.73 km) |
| Security-Widefield to McMinnville (Tennessee) | 1,060.96 mi (1,707.45 km) |
| Security-Widefield to McNair (Virginia) | 1,463.66 mi (2,355.53 km) |
| Security-Widefield to McPherson (Kansas) | 381.89 mi (614.60 km) |
| Security-Widefield to Mead Valley (California) | 777.17 mi (1,250.74 km) |
| Security-Widefield to Meadow Woods (Florida) | 1,518.27 mi (2,443.42 km) |
| Security-Widefield to Meadowbrook (Virginia) | 1,478.65 mi (2,379.66 km) |
| Security-Widefield to Meadville (Pennsylvania) | 1,307.35 mi (2,103.98 km) |
| Security-Widefield to Mebane (North Carolina) | 1,403.57 mi (2,258.83 km) |
| Security-Widefield to Mechanicsville (Virginia) | 1,482.23 mi (2,385.41 km) |
