| Duffel to Superior (Colorado) | 4,855.82 mi (7,814.70 km) |
| Duffel to Superior (Wisconsin) | 4,068.22 mi (6,547.16 km) |
| Duffel to Surprise (Arizona) | 5,442.99 mi (8,759.65 km) |
| Duffel to Susanville (California) | 5,301.65 mi (8,532.18 km) |
| Duffel to Sussex (Wisconsin) | 4,098.83 mi (6,596.43 km) |
| Duffel to Suwanee (Georgia) | 4,376.77 mi (7,043.73 km) |
| Duffel to Swansea (Illinois) | 4,386.29 mi (7,059.06 km) |
| Duffel to Sweetwater (Florida) | 4,637.59 mi (7,463.48 km) |
| Duffel to Sweetwater (Texas) | 5,089.41 mi (8,190.62 km) |
| Duffel to Sycamore (Illinois) | 4,169.96 mi (6,710.90 km) |
| Duffel to Sylacauga (Alabama) | 4,507.91 mi (7,254.78 km) |
| Duffel to Sylvania (Ohio) | 3,996.17 mi (6,431.21 km) |
| Duffel to Syosset (New York) | 3,634.48 mi (5,849.14 km) |
| Duffel to Syracuse (New York) | 3,642.91 mi (5,862.70 km) |
| Duffel to Syracuse (Utah) | 5,013.76 mi (8,068.86 km) |
