| Napa to McHenry (Illinois) | 1,800.95 mi (2,898.34 km) |
| Napa to McKeesport (Pennsylvania) | 2,252.00 mi (3,624.24 km) |
| Napa to McKinleyville (California) | 206.33 mi (332.06 km) |
| Napa to McKinney (Texas) | 1,474.71 mi (2,373.31 km) |
| Napa to McLean (Virginia) | 2,409.97 mi (3,878.47 km) |
| Napa to McMinnville (Oregon) | 479.87 mi (772.27 km) |
| Napa to McMinnville (Tennessee) | 2,010.37 mi (3,235.38 km) |
| Napa to McNair (Virginia) | 2,398.50 mi (3,860.01 km) |
| Napa to McPherson (Kansas) | 1,331.45 mi (2,142.76 km) |
| Napa to Mead Valley (California) | 416.53 mi (670.34 km) |
| Napa to Meadow Woods (Florida) | 2,439.92 mi (3,926.67 km) |
| Napa to Meadowbrook (Virginia) | 2,421.52 mi (3,897.06 km) |
| Napa to Meadville (Pennsylvania) | 2,221.76 mi (3,575.57 km) |
| Napa to Mebane (North Carolina) | 2,351.82 mi (3,784.89 km) |
| Napa to Mechanicsville (Virginia) | 2,424.14 mi (3,901.28 km) |
