| Delaware to Marshall (Minnesota) | 709.00 mi (1,141.03 km) |
| Delaware to Marshall (Missouri) | 544.08 mi (875.61 km) |
| Delaware to Marshall (Texas) | 823.28 mi (1,324.94 km) |
| Delaware to Marshalltown (Iowa) | 525.24 mi (845.29 km) |
| Delaware to Marshfield (Wisconsin) | 471.23 mi (758.37 km) |
| Delaware to Martha Lake (Washington) | 1,989.78 mi (3,202.24 km) |
| Delaware to Martin (Tennessee) | 415.10 mi (668.04 km) |
| Delaware to Martinez (California) | 2,081.21 mi (3,349.39 km) |
| Delaware to Martinez (Georgia) | 470.45 mi (757.12 km) |
| Delaware to Martinsburg (West Virginia) | 276.19 mi (444.48 km) |
| Delaware to Martinsville (Indiana) | 187.96 mi (302.49 km) |
| Delaware to Martinsville (New Jersey) | 447.27 mi (719.81 km) |
| Delaware to Martinsville (Virginia) | 303.44 mi (488.34 km) |
| Delaware to Maryland City (Maryland) | 343.10 mi (552.16 km) |
| Delaware to Maryland Heights (Missouri) | 408.98 mi (658.19 km) |
