| Duncan to Marietta (Georgia) | 764.66 mi (1,230.60 km) |
| Duncan to Marietta (Ohio) | 968.12 mi (1,558.04 km) |
| Duncan to Marina (California) | 1,345.33 mi (2,165.10 km) |
| Duncan to Marinette (Wisconsin) | 908.93 mi (1,462.79 km) |
| Duncan to Marion (Arkansas) | 439.64 mi (707.54 km) |
| Duncan to Marion (Illinois) | 547.18 mi (880.59 km) |
| Duncan to Marion (Indiana) | 788.51 mi (1,268.98 km) |
| Duncan to Marion (Iowa) | 621.59 mi (1,000.36 km) |
| Duncan to Marion (Ohio) | 910.43 mi (1,465.19 km) |
| Duncan to Marion Oaks (Florida) | 998.46 mi (1,606.86 km) |
| Duncan to Markham (Illinois) | 739.03 mi (1,189.36 km) |
| Duncan to Marlborough (Massachusetts) | 1,518.20 mi (2,443.31 km) |
| Duncan to Marlton (New Jersey) | 1,313.90 mi (2,114.51 km) |
| Duncan to Marquette (Michigan) | 994.28 mi (1,600.13 km) |
| Duncan to Marrero (Louisiana) | 558.06 mi (898.10 km) |
