| Mackworth to Smyrna (Delaware) | 3,503.31 mi (5,638.03 km) |
| Mackworth to Smyrna (Georgia) | 4,119.18 mi (6,629.18 km) |
| Mackworth to Smyrna (Tennessee) | 4,094.02 mi (6,588.68 km) |
| Mackworth to Snellville (Georgia) | 4,099.10 mi (6,596.86 km) |
| Mackworth to Snoqualmie (Washington) | 4,661.81 mi (7,502.46 km) |
| Mackworth to Snyder (Texas) | 4,808.84 mi (7,739.08 km) |
| Mackworth to Socastee (South Carolina) | 3,906.52 mi (6,286.94 km) |
| Mackworth to Socorro (Texas) | 5,061.50 mi (8,145.69 km) |
| Mackworth to Soddy-Daisy (Tennessee) | 4,076.09 mi (6,559.83 km) |
| Mackworth to Solana Beach (California) | 5,360.29 mi (8,626.55 km) |
| Mackworth to Soledad (California) | 5,287.78 mi (8,509.87 km) |
| Mackworth to Solon (Ohio) | 3,637.19 mi (5,853.49 km) |
| Mackworth to Somers Point (New Jersey) | 3,462.06 mi (5,571.65 km) |
| Mackworth to Somerset (Kentucky) | 3,964.43 mi (6,380.14 km) |
| Mackworth to Somerset (New Jersey) | 3,403.95 mi (5,478.13 km) |
