| Mill Valley to Southern Pines (North Carolina) | 2,380.42 mi (3,830.92 km) |
| Mill Valley to Southfield (Michigan) | 2,078.27 mi (3,344.65 km) |
| Mill Valley to Southgate (Michigan) | 2,082.66 mi (3,351.72 km) |
| Mill Valley to Southlake (Texas) | 1,464.95 mi (2,357.60 km) |
| Mill Valley to Spanaway (Washington) | 634.95 mi (1,021.85 km) |
| Mill Valley to Spanish Fork (Utah) | 604.29 mi (972.51 km) |
| Mill Valley to Spanish Lake (Missouri) | 1,743.98 mi (2,806.67 km) |
| Mill Valley to Spanish Springs (Nevada) | 196.27 mi (315.87 km) |
| Mill Valley to Sparks (Nevada) | 190.85 mi (307.14 km) |
| Mill Valley to Spartanburg (South Carolina) | 2,249.54 mi (3,620.29 km) |
| Mill Valley to Spearfish (South Dakota) | 1,071.21 mi (1,723.95 km) |
| Mill Valley to Speedway (Indiana) | 1,943.89 mi (3,128.38 km) |
| Mill Valley to Spencer (Iowa) | 1,475.98 mi (2,375.36 km) |
| Mill Valley to Spokane (Washington) | 721.89 mi (1,161.76 km) |
| Mill Valley to Spokane Valley (Washington) | 725.24 mi (1,167.16 km) |
