| Johnston to McKeesport (Pennsylvania) | 728.73 mi (1,172.78 km) |
| Johnston to McKinleyville (California) | 1,568.19 mi (2,523.76 km) |
| Johnston to McKinney (Texas) | 608.27 mi (978.92 km) |
| Johnston to McLean (Virginia) | 889.73 mi (1,431.89 km) |
| Johnston to McMinnville (Oregon) | 1,489.44 mi (2,397.02 km) |
| Johnston to McMinnville (Tennessee) | 595.81 mi (958.86 km) |
| Johnston to McNair (Virginia) | 878.45 mi (1,413.73 km) |
| Johnston to McPherson (Kansas) | 309.75 mi (498.50 km) |
| Johnston to Mead Valley (California) | 1,391.05 mi (2,238.68 km) |
| Johnston to Meadow Woods (Florida) | 1,153.85 mi (1,856.94 km) |
| Johnston to Meadowbrook (Virginia) | 912.57 mi (1,468.64 km) |
| Johnston to Meadville (Pennsylvania) | 700.00 mi (1,126.54 km) |
| Johnston to Mebane (North Carolina) | 866.74 mi (1,394.89 km) |
| Johnston to Mechanicsville (Virginia) | 913.10 mi (1,469.50 km) |
| Johnston to Medford (Massachusetts) | 1,157.81 mi (1,863.32 km) |
