| Duncan to Medford (New York) | 1,425.23 mi (2,293.69 km) |
| Duncan to Medford (Oregon) | 1,446.20 mi (2,327.43 km) |
| Duncan to Medina (Ohio) | 985.16 mi (1,585.47 km) |
| Duncan to Medulla (Florida) | 1,043.70 mi (1,679.67 km) |
| Duncan to Mehlville (Missouri) | 503.00 mi (809.50 km) |
| Duncan to Melbourne (Florida) | 1,109.38 mi (1,785.37 km) |
| Duncan to Melissa (Texas) | 116.61 mi (187.66 km) |
| Duncan to Melrose (Massachusetts) | 1,544.07 mi (2,484.93 km) |
| Duncan to Melrose Park (Illinois) | 745.22 mi (1,199.31 km) |
| Duncan to Melville (New York) | 1,402.97 mi (2,257.86 km) |
| Duncan to Melvindale (Michigan) | 958.60 mi (1,542.72 km) |
| Duncan to Memphis (Florida) | 1,028.18 mi (1,654.69 km) |
| Duncan to Memphis (Tennessee) | 452.79 mi (728.70 km) |
| Duncan to Menasha (Wisconsin) | 837.62 mi (1,348.02 km) |
| Duncan to Mendota (California) | 1,267.13 mi (2,039.24 km) |
