| Duffel to Smyrna (Delaware) | 3,787.43 mi (6,095.27 km) |
| Duffel to Smyrna (Georgia) | 4,404.02 mi (7,087.58 km) |
| Duffel to Smyrna (Tennessee) | 4,380.14 mi (7,049.16 km) |
| Duffel to Snellville (Georgia) | 4,383.73 mi (7,054.94 km) |
| Duffel to Snoqualmie (Washington) | 4,917.69 mi (7,914.25 km) |
| Duffel to Snyder (Texas) | 5,094.80 mi (8,199.29 km) |
| Duffel to Socastee (South Carolina) | 4,188.53 mi (6,740.79 km) |
| Duffel to Socorro (Texas) | 5,346.04 mi (8,603.62 km) |
| Duffel to Soddy-Daisy (Tennessee) | 4,361.69 mi (7,019.45 km) |
| Duffel to Solana Beach (California) | 5,636.51 mi (9,071.09 km) |
| Duffel to Soledad (California) | 5,556.69 mi (8,942.62 km) |
| Duffel to Solon (Ohio) | 3,923.64 mi (6,314.49 km) |
| Duffel to Somers Point (New Jersey) | 3,745.76 mi (6,028.21 km) |
| Duffel to Somerset (Kentucky) | 4,250.45 mi (6,840.44 km) |
| Duffel to Somerset (New Jersey) | 3,688.37 mi (5,935.86 km) |
