| Duncan to Spout Springs (North Carolina) | 1,069.84 mi (1,721.74 km) |
| Duncan to Spring (Texas) | 343.14 mi (552.23 km) |
| Duncan to Spring Creek (Nevada) | 1,055.33 mi (1,698.39 km) |
| Duncan to Spring Hill (Florida) | 997.19 mi (1,604.81 km) |
| Duncan to Spring Hill (Tennessee) | 627.24 mi (1,009.44 km) |
| Duncan to Spring Lake (North Carolina) | 1,072.23 mi (1,725.59 km) |
| Duncan to Spring Valley (California) | 1,101.59 mi (1,772.84 km) |
| Duncan to Spring Valley (Nevada) | 982.26 mi (1,580.79 km) |
| Duncan to Spring Valley (New York) | 1,374.46 mi (2,211.99 km) |
| Duncan to Springboro (Ohio) | 829.44 mi (1,334.86 km) |
| Duncan to Springdale (Arkansas) | 240.73 mi (387.42 km) |
| Duncan to Springdale (New Jersey) | 1,311.38 mi (2,110.46 km) |
| Duncan to Springdale (Ohio) | 810.94 mi (1,305.08 km) |
| Duncan to Springfield (Illinois) | 580.80 mi (934.71 km) |
| Duncan to Springfield (Massachusetts) | 1,465.14 mi (2,357.91 km) |
