| Napa to Smyrna (Delaware) | 2,486.93 mi (4,002.32 km) |
| Napa to Smyrna (Georgia) | 2,117.18 mi (3,407.27 km) |
| Napa to Smyrna (Tennessee) | 1,964.88 mi (3,162.17 km) |
| Napa to Snellville (Georgia) | 2,145.11 mi (3,452.21 km) |
| Napa to Snoqualmie (Washington) | 638.28 mi (1,027.21 km) |
| Napa to Snyder (Texas) | 1,260.01 mi (2,027.79 km) |
| Napa to Socastee (South Carolina) | 2,418.94 mi (3,892.91 km) |
| Napa to Socorro (Texas) | 1,016.13 mi (1,635.30 km) |
| Napa to Soddy-Daisy (Tennessee) | 2,051.59 mi (3,301.71 km) |
| Napa to Solana Beach (California) | 462.92 mi (744.99 km) |
| Napa to Soledad (California) | 138.50 mi (222.90 km) |
| Napa to Solon (Ohio) | 2,158.09 mi (3,473.11 km) |
| Napa to Somers Point (New Jersey) | 2,538.55 mi (4,085.39 km) |
| Napa to Somerset (Kentucky) | 2,048.08 mi (3,296.07 km) |
| Napa to Somerset (New Jersey) | 2,525.12 mi (4,063.80 km) |
