| Backnang to Caguas (Puerto Rico) | 4,621.91 mi (7,438.25 km) |
| Backnang to Cahokia (Illinois) | 4,656.54 mi (7,493.97 km) |
| Backnang to Calabasas (California) | 5,870.50 mi (9,447.66 km) |
| Backnang to Caldwell (Idaho) | 5,256.81 mi (8,460.01 km) |
| Backnang to Caledonia (Wisconsin) | 4,365.88 mi (7,026.21 km) |
| Backnang to Calera (Alabama) | 4,790.49 mi (7,709.56 km) |
| Backnang to Calexico (California) | 5,858.59 mi (9,428.49 km) |
| Backnang to Calhoun (Georgia) | 4,650.49 mi (7,484.24 km) |
| Backnang to California (Maryland) | 4,127.45 mi (6,642.49 km) |
| Backnang to California City (California) | 5,786.73 mi (9,312.84 km) |
| Backnang to Callaway (Florida) | 4,890.39 mi (7,870.32 km) |
| Backnang to Calumet City (Illinois) | 4,409.87 mi (7,097.01 km) |
| Backnang to Calverton (Maryland) | 4,111.85 mi (6,617.39 km) |
| Backnang to Camano (Washington) | 5,137.71 mi (8,268.34 km) |
| Backnang to Camarillo (California) | 5,876.19 mi (9,456.81 km) |
