| Pittsburgh to Maryland Heights (Missouri) | 571.21 mi (919.28 km) |
| Pittsburgh to Marysville (California) | 2,189.99 mi (3,524.44 km) |
| Pittsburgh to Marysville (Ohio) | 178.78 mi (287.72 km) |
| Pittsburgh to Marysville (Washington) | 2,124.30 mi (3,418.73 km) |
| Pittsburgh to Maryville (Missouri) | 782.88 mi (1,259.92 km) |
| Pittsburgh to Maryville (Tennessee) | 390.42 mi (628.32 km) |
| Pittsburgh to Mason (Ohio) | 241.17 mi (388.12 km) |
| Pittsburgh to Mason City (Iowa) | 705.56 mi (1,135.48 km) |
| Pittsburgh to Massapequa (New York) | 341.81 mi (550.10 km) |
| Pittsburgh to Massapequa Park (New York) | 342.92 mi (551.88 km) |
| Pittsburgh to Massillon (Ohio) | 84.66 mi (136.24 km) |
| Pittsburgh to Mastic (New York) | 374.59 mi (602.85 km) |
| Pittsburgh to Mastic Beach (New York) | 375.10 mi (603.66 km) |
| Pittsburgh to Matteson (Illinois) | 411.89 mi (662.87 km) |
| Pittsburgh to Matthews (North Carolina) | 369.76 mi (595.08 km) |
