| Rockford to Maryland Heights (Missouri) | 255.61 mi (411.37 km) |
| Rockford to Marysville (California) | 1,706.29 mi (2,746.01 km) |
| Rockford to Marysville (Ohio) | 327.83 mi (527.59 km) |
| Rockford to Marysville (Washington) | 1,647.55 mi (2,651.48 km) |
| Rockford to Maryville (Missouri) | 329.10 mi (529.64 km) |
| Rockford to Maryville (Tennessee) | 526.10 mi (846.68 km) |
| Rockford to Mason (Ohio) | 319.64 mi (514.41 km) |
| Rockford to Mason City (Iowa) | 218.76 mi (352.06 km) |
| Rockford to Massapequa (New York) | 813.66 mi (1,309.47 km) |
| Rockford to Massapequa Park (New York) | 814.52 mi (1,310.84 km) |
| Rockford to Massillon (Ohio) | 402.93 mi (648.46 km) |
| Rockford to Mastic (New York) | 843.36 mi (1,357.26 km) |
| Rockford to Mastic Beach (New York) | 844.56 mi (1,359.18 km) |
| Rockford to Matteson (Illinois) | 85.30 mi (137.28 km) |
| Rockford to Matthews (North Carolina) | 667.42 mi (1,074.10 km) |
