| Thornton to Alum Rock (California) | 5,196.97 mi (8,363.71 km) |
| Thornton to Alvin (Texas) | 4,739.21 mi (7,627.03 km) |
| Thornton to Amarillo (Texas) | 4,669.26 mi (7,514.45 km) |
| Thornton to Amelia (Ohio) | 3,822.27 mi (6,151.34 km) |
| Thornton to American Canyon (California) | 5,162.00 mi (8,307.43 km) |
| Thornton to American Fork (Utah) | 4,721.42 mi (7,598.39 km) |
| Thornton to Americus (Georgia) | 4,168.99 mi (6,709.35 km) |
| Thornton to Ames (Iowa) | 4,022.91 mi (6,474.25 km) |
| Thornton to Amherst (Ohio) | 3,632.91 mi (5,846.60 km) |
| Thornton to Ammon (Idaho) | 4,555.67 mi (7,331.65 km) |
| Thornton to Amsterdam (New York) | 3,253.50 mi (5,236.00 km) |
| Thornton to Anacortes (Washington) | 4,572.76 mi (7,359.15 km) |
| Thornton to Anaheim (California) | 5,282.76 mi (8,501.78 km) |
| Thornton to Anchorage (Alaska) | 4,295.01 mi (6,912.16 km) |
| Thornton to Anderson (California) | 5,030.09 mi (8,095.15 km) |
