| Thornton to Ashwaubenon (Wisconsin) | 3,705.56 mi (5,963.53 km) |
| Thornton to Aspen Hill (Maryland) | 3,542.39 mi (5,700.92 km) |
| Thornton to Astoria (Oregon) | 4,736.06 mi (7,621.95 km) |
| Thornton to Atascadero (California) | 5,273.85 mi (8,487.43 km) |
| Thornton to Atascocita (Texas) | 4,703.93 mi (7,570.24 km) |
| Thornton to Atchison (Kansas) | 4,201.17 mi (6,761.13 km) |
| Thornton to Athens (Alabama) | 4,137.61 mi (6,658.85 km) |
| Thornton to Athens (Georgia) | 4,040.15 mi (6,501.99 km) |
| Thornton to Athens (Ohio) | 3,726.36 mi (5,996.99 km) |
| Thornton to Athens (Tennessee) | 4,012.89 mi (6,458.12 km) |
| Thornton to Athens (Texas) | 4,609.61 mi (7,418.45 km) |
| Thornton to Atlanta (Georgia) | 4,090.94 mi (6,583.73 km) |
| Thornton to Atlantic Beach (Florida) | 4,146.03 mi (6,672.39 km) |
| Thornton to Atlantic City (New Jersey) | 3,425.33 mi (5,512.54 km) |
| Thornton to Attleboro (Massachusetts) | 3,184.77 mi (5,125.40 km) |
