| Delaware to Marysville (California) | 2,031.91 mi (3,270.05 km) |
| Delaware to Marysville (Ohio) | 15.56 mi (25.04 km) |
| Delaware to Marysville (Washington) | 1,986.46 mi (3,196.89 km) |
| Delaware to Maryville (Missouri) | 621.02 mi (999.44 km) |
| Delaware to Maryville (Tennessee) | 317.40 mi (510.81 km) |
| Delaware to Mason (Ohio) | 91.43 mi (147.14 km) |
| Delaware to Mason City (Iowa) | 557.99 mi (898.00 km) |
| Delaware to Massapequa (New York) | 505.18 mi (813.00 km) |
| Delaware to Massapequa Park (New York) | 506.27 mi (814.77 km) |
| Delaware to Massillon (Ohio) | 88.32 mi (142.14 km) |
| Delaware to Mastic (New York) | 537.81 mi (865.52 km) |
| Delaware to Mastic Beach (New York) | 538.37 mi (866.42 km) |
| Delaware to Matteson (Illinois) | 258.24 mi (415.60 km) |
| Delaware to Matthews (North Carolina) | 379.54 mi (610.81 km) |
| Delaware to Mattoon (Illinois) | 285.84 mi (460.01 km) |
