| Philadelphia to Maryland Heights (Missouri) | 823.29 mi (1,324.95 km) |
| Philadelphia to Marysville (California) | 2,445.71 mi (3,936.00 km) |
| Philadelphia to Marysville (Ohio) | 434.73 mi (699.63 km) |
| Philadelphia to Marysville (Washington) | 2,362.04 mi (3,801.33 km) |
| Philadelphia to Maryville (Missouri) | 1,040.02 mi (1,673.76 km) |
| Philadelphia to Maryville (Tennessee) | 564.70 mi (908.80 km) |
| Philadelphia to Mason (Ohio) | 489.37 mi (787.56 km) |
| Philadelphia to Mason City (Iowa) | 956.57 mi (1,539.46 km) |
| Philadelphia to Massapequa (New York) | 98.75 mi (158.93 km) |
| Philadelphia to Massapequa Park (New York) | 100.18 mi (161.22 km) |
| Philadelphia to Massillon (Ohio) | 340.49 mi (547.97 km) |
| Philadelphia to Mastic (New York) | 132.41 mi (213.09 km) |
| Philadelphia to Mastic Beach (New York) | 131.76 mi (212.04 km) |
| Philadelphia to Matteson (Illinois) | 667.59 mi (1,074.38 km) |
| Philadelphia to Matthews (North Carolina) | 455.14 mi (732.48 km) |
