| Boulder to South Fulton (Georgia) | 1,222.20 mi (1,966.94 km) |
| Boulder to South Gate (California) | 827.32 mi (1,331.45 km) |
| Boulder to South Hill (Washington) | 980.46 mi (1,577.90 km) |
| Boulder to South Holland (Illinois) | 927.73 mi (1,493.04 km) |
| Boulder to South Houston (Texas) | 912.91 mi (1,469.19 km) |
| Boulder to South Huntington (New York) | 1,667.45 mi (2,683.50 km) |
| Boulder to South Jordan (Utah) | 356.29 mi (573.39 km) |
| Boulder to South Lake Tahoe (California) | 788.20 mi (1,268.49 km) |
| Boulder to South Laurel (Maryland) | 1,508.60 mi (2,427.87 km) |
| Boulder to South Lyon (Michigan) | 1,131.57 mi (1,821.09 km) |
| Boulder to South Miami (Florida) | 1,744.04 mi (2,806.77 km) |
| Boulder to South Miami Heights (Florida) | 1,745.15 mi (2,808.55 km) |
| Boulder to South Milwaukee (Wisconsin) | 920.36 mi (1,481.17 km) |
| Boulder to South Ogden (Utah) | 360.49 mi (580.15 km) |
| Boulder to South Pasadena (California) | 819.25 mi (1,318.46 km) |
