| Pittsburgh to Mattoon (Illinois) | 448.90 mi (722.43 km) |
| Pittsburgh to Mauldin (South Carolina) | 411.08 mi (661.57 km) |
| Pittsburgh to Maumee (Ohio) | 207.48 mi (333.91 km) |
| Pittsburgh to Maumelle (Arkansas) | 780.58 mi (1,256.22 km) |
| Pittsburgh to Mayagüez (Puerto Rico) | 1,715.75 mi (2,761.23 km) |
| Pittsburgh to Mayfield Heights (Ohio) | 107.15 mi (172.44 km) |
| Pittsburgh to Mays Chapel (Maryland) | 189.32 mi (304.68 km) |
| Pittsburgh to Maywood (California) | 2,131.98 mi (3,431.09 km) |
| Pittsburgh to Maywood (Illinois) | 421.03 mi (677.58 km) |
| Pittsburgh to McAlester (Oklahoma) | 942.29 mi (1,516.48 km) |
| Pittsburgh to McAllen (Texas) | 1,435.59 mi (2,310.36 km) |
| Pittsburgh to McCalla (Alabama) | 628.18 mi (1,010.96 km) |
| Pittsburgh to McComb (Mississippi) | 864.28 mi (1,390.92 km) |
| Pittsburgh to McDonough (Georgia) | 535.60 mi (861.97 km) |
| Pittsburgh to McFarland (California) | 2,143.43 mi (3,449.52 km) |
