| Duncan to El Sobrante (California) | 1,115.81 mi (1,795.72 km) |
| Duncan to Eldersburg (Maryland) | 1,202.10 mi (1,934.60 km) |
| Duncan to Elfers (Florida) | 995.92 mi (1,602.78 km) |
| Duncan to Elgin (Illinois) | 733.41 mi (1,180.32 km) |
| Duncan to Elizabeth (New Jersey) | 1,361.22 mi (2,190.67 km) |
| Duncan to Elizabeth City (North Carolina) | 1,224.48 mi (1,970.61 km) |
| Duncan to Elizabethton (Tennessee) | 890.59 mi (1,433.26 km) |
| Duncan to Elizabethtown (Kentucky) | 706.20 mi (1,136.51 km) |
| Duncan to Elizabethtown (Pennsylvania) | 1,230.11 mi (1,979.68 km) |
| Duncan to Elk City (Oklahoma) | 103.48 mi (166.54 km) |
| Duncan to Elk Grove (California) | 1,326.89 mi (2,135.43 km) |
| Duncan to Elk Grove Village (Illinois) | 744.78 mi (1,198.61 km) |
| Duncan to Elk Plain (Washington) | 1,532.81 mi (2,466.81 km) |
| Duncan to Elk River (Minnesota) | 780.11 mi (1,255.47 km) |
| Duncan to Elkhart (Indiana) | 815.21 mi (1,311.95 km) |
