| Duncan to Anderson (California) | 1,391.93 mi (2,240.09 km) |
| Duncan to Anderson (Indiana) | 772.77 mi (1,243.66 km) |
| Duncan to Anderson (South Carolina) | 868.56 mi (1,397.81 km) |
| Duncan to Anderson Creek (North Carolina) | 1,074.10 mi (1,728.59 km) |
| Duncan to Andover (Kansas) | 221.79 mi (356.93 km) |
| Duncan to Andover (Minnesota) | 779.10 mi (1,253.85 km) |
| Duncan to Andrews (Texas) | 307.88 mi (495.48 km) |
| Duncan to Angleton (Texas) | 398.69 mi (641.63 km) |
| Duncan to Ankeny (Iowa) | 549.11 mi (883.70 km) |
| Duncan to Ann Arbor (Michigan) | 933.89 mi (1,502.95 km) |
| Duncan to Anna (Texas) | 113.90 mi (183.31 km) |
| Duncan to Annandale (Virginia) | 1,183.13 mi (1,904.06 km) |
| Duncan to Annapolis (Maryland) | 1,221.26 mi (1,965.43 km) |
| Duncan to Annapolis Neck (Maryland) | 1,221.25 mi (1,965.41 km) |
| Duncan to Anniston (Alabama) | 694.87 mi (1,118.29 km) |
