| Duncan to Monroe (Washington) | 1,542.21 mi (2,481.95 km) |
| Duncan to Monroe (Wisconsin) | 713.74 mi (1,148.65 km) |
| Duncan to Monroeville (Pennsylvania) | 1,072.99 mi (1,726.82 km) |
| Duncan to Monrovia (California) | 1,143.28 mi (1,839.93 km) |
| Duncan to Monsey (New York) | 1,373.51 mi (2,210.45 km) |
| Duncan to Montclair (California) | 1,127.39 mi (1,814.36 km) |
| Duncan to Montclair (Virginia) | 1,173.36 mi (1,888.34 km) |
| Duncan to Montebello (California) | 1,151.32 mi (1,852.87 km) |
| Duncan to Monterey (California) | 1,350.51 mi (2,173.44 km) |
| Duncan to Monterey Park (California) | 1,152.25 mi (1,854.36 km) |
| Duncan to Montgomery (Alabama) | 688.36 mi (1,107.80 km) |
| Duncan to Montgomery (Illinois) | 717.57 mi (1,154.82 km) |
| Duncan to Montgomery (Ohio) | 816.55 mi (1,314.12 km) |
| Duncan to Montgomery Village (Maryland) | 1,186.75 mi (1,909.90 km) |
| Duncan to Montgomeryville (Pennsylvania) | 1,301.77 mi (2,094.99 km) |
