| Duluth to Smyrna (Delaware) | 978.99 mi (1,575.53 km) |
| Duluth to Smyrna (Georgia) | 977.20 mi (1,572.65 km) |
| Duluth to Smyrna (Tennessee) | 800.85 mi (1,288.85 km) |
| Duluth to Snellville (Georgia) | 988.90 mi (1,591.47 km) |
| Duluth to Snoqualmie (Washington) | 1,388.04 mi (2,233.84 km) |
| Duluth to Snyder (Texas) | 1,075.96 mi (1,731.58 km) |
| Duluth to Socastee (South Carolina) | 1,135.82 mi (1,827.92 km) |
| Duluth to Socorro (Texas) | 1,286.18 mi (2,069.90 km) |
| Duluth to Soddy-Daisy (Tennessee) | 873.91 mi (1,406.42 km) |
| Duluth to Solana Beach (California) | 1,625.35 mi (2,615.75 km) |
| Duluth to Soledad (California) | 1,656.18 mi (2,665.36 km) |
| Duluth to Solon (Ohio) | 647.66 mi (1,042.31 km) |
| Duluth to Somers Point (New Jersey) | 1,021.01 mi (1,643.16 km) |
| Duluth to Somerset (Kentucky) | 772.59 mi (1,243.36 km) |
| Duluth to Somerset (New Jersey) | 979.53 mi (1,576.40 km) |
