| Pittsburgh to McHenry (Illinois) | 450.42 mi (724.88 km) |
| Pittsburgh to McKeesport (Pennsylvania) | 9.71 mi (15.62 km) |
| Pittsburgh to McKinleyville (California) | 2,285.96 mi (3,678.90 km) |
| Pittsburgh to McKinney (Texas) | 1,047.44 mi (1,685.69 km) |
| Pittsburgh to McLean (Virginia) | 180.44 mi (290.38 km) |
| Pittsburgh to McMinnville (Oregon) | 2,187.99 mi (3,521.23 km) |
| Pittsburgh to McMinnville (Tennessee) | 455.39 mi (732.89 km) |
| Pittsburgh to McNair (Virginia) | 170.77 mi (274.83 km) |
| Pittsburgh to McPherson (Kansas) | 953.20 mi (1,534.02 km) |
| Pittsburgh to Mead Valley (California) | 2,088.80 mi (3,361.60 km) |
| Pittsburgh to Meadow Woods (Florida) | 837.57 mi (1,347.94 km) |
| Pittsburgh to Meadowbrook (Virginia) | 247.62 mi (398.50 km) |
| Pittsburgh to Meadville (Pennsylvania) | 83.93 mi (135.07 km) |
| Pittsburgh to Mebane (North Carolina) | 303.27 mi (488.06 km) |
| Pittsburgh to Mechanicsville (Virginia) | 239.89 mi (386.07 km) |
