| Boulder to Attleboro (Massachusetts) | 1,764.62 mi (2,839.87 km) |
| Boulder to Atwater (California) | 846.67 mi (1,362.59 km) |
| Boulder to Auburn (Alabama) | 1,210.09 mi (1,947.46 km) |
| Boulder to Auburn (California) | 846.67 mi (1,362.59 km) |
| Boulder to Auburn (Indiana) | 1,059.64 mi (1,705.33 km) |
| Boulder to Auburn (Maine) | 1,803.62 mi (2,902.64 km) |
| Boulder to Auburn (New York) | 1,490.99 mi (2,399.51 km) |
| Boulder to Auburn (Washington) | 982.48 mi (1,581.16 km) |
| Boulder to Auburn Hills (Michigan) | 1,152.69 mi (1,855.08 km) |
| Boulder to Auburndale (Florida) | 1,567.71 mi (2,522.98 km) |
| Boulder to Augusta (Georgia) | 1,359.45 mi (2,187.82 km) |
| Boulder to Augusta (Maine) | 1,828.23 mi (2,942.25 km) |
| Boulder to Aurora (Colorado) | 35.56 mi (57.22 km) |
| Boulder to Aurora (Illinois) | 892.54 mi (1,436.40 km) |
| Boulder to Aurora (Ohio) | 1,252.09 mi (2,015.05 km) |
