| Boulder to Iselin (New Jersey) | 1,622.21 mi (2,610.70 km) |
| Boulder to Isla Vista (California) | 890.93 mi (1,433.81 km) |
| Boulder to Issaquah (Washington) | 982.61 mi (1,581.36 km) |
| Boulder to Ithaca (New York) | 1,495.90 mi (2,407.41 km) |
| Boulder to Ives Estates (Florida) | 1,737.90 mi (2,796.87 km) |
| Boulder to Jackson (Michigan) | 1,092.92 mi (1,758.88 km) |
| Boulder to Jackson (Mississippi) | 991.59 mi (1,595.81 km) |
| Boulder to Jackson (Missouri) | 859.60 mi (1,383.39 km) |
| Boulder to Jackson (Tennessee) | 943.66 mi (1,518.68 km) |
| Boulder to Jackson (Wyoming) | 371.01 mi (597.09 km) |
| Boulder to Jacksonville (Alabama) | 1,156.47 mi (1,861.16 km) |
| Boulder to Jacksonville (Arkansas) | 801.59 mi (1,290.04 km) |
| Boulder to Jacksonville (Florida) | 1,484.08 mi (2,388.39 km) |
| Boulder to Jacksonville (Illinois) | 795.77 mi (1,280.67 km) |
| Boulder to Jacksonville (North Carolina) | 1,565.80 mi (2,519.91 km) |
