| Duncan to Savannah (Georgia) | 981.10 mi (1,578.94 km) |
| Duncan to Sayreville (New Jersey) | 1,351.91 mi (2,175.69 km) |
| Duncan to Sayville (New York) | 1,419.31 mi (2,284.16 km) |
| Duncan to Scaggsville (Maryland) | 1,202.82 mi (1,935.75 km) |
| Duncan to Scarsdale (New York) | 1,386.65 mi (2,231.59 km) |
| Duncan to Schaumburg (Illinois) | 742.32 mi (1,194.65 km) |
| Duncan to Schenectady (New York) | 1,408.19 mi (2,266.26 km) |
| Duncan to Schererville (Indiana) | 744.38 mi (1,197.96 km) |
| Duncan to Schertz (Texas) | 344.34 mi (554.17 km) |
| Duncan to Schiller Park (Illinois) | 747.46 mi (1,202.92 km) |
| Duncan to Schofield Barracks (Hawaii) | 3,723.43 mi (5,992.28 km) |
| Duncan to Scotchtown (New York) | 1,363.61 mi (2,194.51 km) |
| Duncan to Scottdale (Georgia) | 781.90 mi (1,258.35 km) |
| Duncan to Scotts Valley (California) | 1,357.48 mi (2,184.65 km) |
| Duncan to Scottsbluff (Nebraska) | 594.18 mi (956.23 km) |
