| Witham to Smyrna (Delaware) | 3,613.92 mi (5,816.04 km) |
| Witham to Smyrna (Georgia) | 4,230.75 mi (6,808.73 km) |
| Witham to Smyrna (Tennessee) | 4,207.85 mi (6,771.88 km) |
| Witham to Snellville (Georgia) | 4,210.39 mi (6,775.96 km) |
| Witham to Snoqualmie (Washington) | 4,779.95 mi (7,692.58 km) |
| Witham to Snyder (Texas) | 4,926.75 mi (7,928.84 km) |
| Witham to Socastee (South Carolina) | 4,014.71 mi (6,461.05 km) |
| Witham to Socorro (Texas) | 5,180.54 mi (8,337.28 km) |
| Witham to Soddy-Daisy (Tennessee) | 4,188.86 mi (6,741.32 km) |
| Witham to Solana Beach (California) | 5,480.75 mi (8,820.41 km) |
| Witham to Soledad (California) | 5,407.86 mi (8,703.11 km) |
| Witham to Solon (Ohio) | 3,751.98 mi (6,038.23 km) |
| Witham to Somers Point (New Jersey) | 3,572.15 mi (5,748.81 km) |
| Witham to Somerset (Kentucky) | 4,078.02 mi (6,562.94 km) |
| Witham to Somerset (New Jersey) | 3,514.96 mi (5,656.78 km) |
