| Rancho San Diego to McHenry (Illinois) | 1,691.63 mi (2,722.41 km) |
| Rancho San Diego to McKeesport (Pennsylvania) | 2,106.88 mi (3,390.70 km) |
| Rancho San Diego to McKinleyville (California) | 689.99 mi (1,110.44 km) |
| Rancho San Diego to McKinney (Texas) | 1,172.37 mi (1,886.75 km) |
| Rancho San Diego to McLean (Virginia) | 2,247.10 mi (3,616.35 km) |
| Rancho San Diego to McMinnville (Oregon) | 922.98 mi (1,485.39 km) |
| Rancho San Diego to McMinnville (Tennessee) | 1,782.88 mi (2,869.26 km) |
| Rancho San Diego to McNair (Virginia) | 2,235.41 mi (3,597.55 km) |
| Rancho San Diego to McPherson (Kansas) | 1,147.04 mi (1,845.99 km) |
| Rancho San Diego to Mead Valley (California) | 76.94 mi (123.83 km) |
| Rancho San Diego to Meadow Woods (Florida) | 2,127.97 mi (3,424.63 km) |
| Rancho San Diego to Meadowbrook (Virginia) | 2,236.74 mi (3,599.68 km) |
| Rancho San Diego to Meadville (Pennsylvania) | 2,096.92 mi (3,374.67 km) |
| Rancho San Diego to Mebane (North Carolina) | 2,144.50 mi (3,451.23 km) |
| Rancho San Diego to Mechanicsville (Virginia) | 2,242.33 mi (3,608.68 km) |
