| Rockwall to Maryland Heights (Missouri) | 521.56 mi (839.36 km) |
| Rockwall to Marysville (California) | 1,464.06 mi (2,356.17 km) |
| Rockwall to Marysville (Ohio) | 882.65 mi (1,420.49 km) |
| Rockwall to Marysville (Washington) | 1,696.01 mi (2,729.47 km) |
| Rockwall to Maryville (Missouri) | 520.36 mi (837.44 km) |
| Rockwall to Maryville (Tennessee) | 736.64 mi (1,185.50 km) |
| Rockwall to Mason (Ohio) | 809.12 mi (1,302.15 km) |
| Rockwall to Mason City (Iowa) | 728.41 mi (1,172.27 km) |
| Rockwall to Massapequa (New York) | 1,373.76 mi (2,210.85 km) |
| Rockwall to Massapequa Park (New York) | 1,375.08 mi (2,212.98 km) |
| Rockwall to Massillon (Ohio) | 985.36 mi (1,585.78 km) |
| Rockwall to Mastic (New York) | 1,407.79 mi (2,265.62 km) |
| Rockwall to Mastic Beach (New York) | 1,407.57 mi (2,265.26 km) |
| Rockwall to Matteson (Illinois) | 761.46 mi (1,225.44 km) |
| Rockwall to Matthews (North Carolina) | 912.44 mi (1,468.43 km) |
