| Thornton to Southern Pines (North Carolina) | 3,821.90 mi (6,150.75 km) |
| Thornton to Southfield (Michigan) | 3,621.53 mi (5,828.28 km) |
| Thornton to Southgate (Michigan) | 3,632.17 mi (5,845.42 km) |
| Thornton to Southlake (Texas) | 4,618.97 mi (7,433.52 km) |
| Thornton to Spanaway (Washington) | 4,647.48 mi (7,479.40 km) |
| Thornton to Spanish Fork (Utah) | 4,731.40 mi (7,614.45 km) |
| Thornton to Spanish Lake (Missouri) | 4,059.80 mi (6,533.61 km) |
| Thornton to Spanish Springs (Nevada) | 5,001.08 mi (8,048.47 km) |
| Thornton to Sparks (Nevada) | 5,007.26 mi (8,058.40 km) |
| Thornton to Spartanburg (South Carolina) | 3,933.71 mi (6,330.69 km) |
| Thornton to Spearfish (South Dakota) | 4,245.11 mi (6,831.85 km) |
| Thornton to Speedway (Indiana) | 3,861.93 mi (6,215.18 km) |
| Thornton to Spencer (Iowa) | 4,021.25 mi (6,471.58 km) |
| Thornton to Spokane (Washington) | 4,482.08 mi (7,213.21 km) |
| Thornton to Spokane Valley (Washington) | 4,476.89 mi (7,204.86 km) |
