| Thornton to Ansonia (Connecticut) | 3,280.88 mi (5,280.07 km) |
| Thornton to Antelope (California) | 5,104.83 mi (8,215.44 km) |
| Thornton to Anthem (Arizona) | 5,096.68 mi (8,202.31 km) |
| Thornton to Antioch (California) | 5,160.46 mi (8,304.96 km) |
| Thornton to Antioch (Illinois) | 3,800.27 mi (6,115.94 km) |
| Thornton to Apache Junction (Arizona) | 5,103.12 mi (8,212.68 km) |
| Thornton to Apex (North Carolina) | 3,774.86 mi (6,075.04 km) |
| Thornton to Apollo Beach (Florida) | 4,318.73 mi (6,950.32 km) |
| Thornton to Apopka (Florida) | 4,235.05 mi (6,815.65 km) |
| Thornton to Apple Valley (California) | 5,222.27 mi (8,404.43 km) |
| Thornton to Apple Valley (Minnesota) | 3,874.39 mi (6,235.24 km) |
| Thornton to Appleton (Wisconsin) | 3,725.91 mi (5,996.27 km) |
| Thornton to Arbutus (Maryland) | 3,520.00 mi (5,664.90 km) |
| Thornton to Arcadia (California) | 5,271.30 mi (8,483.33 km) |
| Thornton to Arcata (California) | 5,055.18 mi (8,135.52 km) |
