| Blackburn to Cookeville (Tennessee) | 3,990.00 mi (6,421.29 km) |
| Blackburn to Coolidge (Arizona) | 5,109.25 mi (8,222.54 km) |
| Blackburn to Coon Rapids (Minnesota) | 3,836.86 mi (6,174.83 km) |
| Blackburn to Cooper City (Florida) | 4,297.84 mi (6,916.71 km) |
| Blackburn to Coos Bay (Oregon) | 4,896.72 mi (7,880.51 km) |
| Blackburn to Copiague (New York) | 3,299.88 mi (5,310.65 km) |
| Blackburn to Coppell (Texas) | 4,590.23 mi (7,387.26 km) |
| Blackburn to Copperas Cove (Texas) | 4,722.88 mi (7,600.74 km) |
| Blackburn to Coral Gables (Florida) | 4,315.18 mi (6,944.61 km) |
| Blackburn to Coral Springs (Florida) | 4,285.04 mi (6,896.10 km) |
| Blackburn to Coral Terrace (Florida) | 4,314.30 mi (6,943.19 km) |
| Blackburn to Coralville (Iowa) | 3,944.78 mi (6,348.51 km) |
| Blackburn to Coram (New York) | 3,275.08 mi (5,270.73 km) |
| Blackburn to Corcoran (California) | 5,187.76 mi (8,348.89 km) |
| Blackburn to Cordele (Georgia) | 4,132.71 mi (6,650.95 km) |
