| Walnut Creek to Smithville (Missouri) | 1,479.94 mi (2,381.73 km) |
| Walnut Creek to Smyrna (Delaware) | 2,481.24 mi (3,993.18 km) |
| Walnut Creek to Smyrna (Georgia) | 2,104.78 mi (3,387.31 km) |
| Walnut Creek to Smyrna (Tennessee) | 1,954.03 mi (3,144.70 km) |
| Walnut Creek to Snellville (Georgia) | 2,132.83 mi (3,432.46 km) |
| Walnut Creek to Snoqualmie (Washington) | 665.23 mi (1,070.58 km) |
| Walnut Creek to Snyder (Texas) | 1,240.93 mi (1,997.08 km) |
| Walnut Creek to Socastee (South Carolina) | 2,407.78 mi (3,874.95 km) |
| Walnut Creek to Socorro (Texas) | 992.88 mi (1,597.89 km) |
| Walnut Creek to Soddy-Daisy (Tennessee) | 2,040.34 mi (3,283.60 km) |
| Walnut Creek to Solana Beach (California) | 432.82 mi (696.56 km) |
| Walnut Creek to Soledad (California) | 107.88 mi (173.62 km) |
| Walnut Creek to Solon (Ohio) | 2,153.60 mi (3,465.89 km) |
| Walnut Creek to Somers Point (New Jersey) | 2,533.04 mi (4,076.54 km) |
| Walnut Creek to Somerset (Kentucky) | 2,038.76 mi (3,281.06 km) |
