| Backnang to Carson (California) | 5,875.90 mi (9,456.35 km) |
| Backnang to Carson City (Nevada) | 5,604.86 mi (9,020.15 km) |
| Backnang to Carteret (New Jersey) | 3,933.39 mi (6,330.18 km) |
| Backnang to Cartersville (Georgia) | 4,660.82 mi (7,500.86 km) |
| Backnang to Carthage (Missouri) | 4,883.05 mi (7,858.52 km) |
| Backnang to Cary (Illinois) | 4,407.47 mi (7,093.14 km) |
| Backnang to Cary (North Carolina) | 4,338.65 mi (6,982.38 km) |
| Backnang to Casa de Oro-Mount Helix (California) | 5,899.87 mi (9,494.93 km) |
| Backnang to Casa Grande (Arizona) | 5,725.83 mi (9,214.83 km) |
| Backnang to Casas Adobes (Arizona) | 5,733.08 mi (9,226.51 km) |
| Backnang to Cascades (Virginia) | 4,130.25 mi (6,646.99 km) |
| Backnang to Casper (Wyoming) | 4,997.47 mi (8,042.65 km) |
| Backnang to Casselberry (Florida) | 4,785.38 mi (7,701.32 km) |
| Backnang to Castaic (California) | 5,849.06 mi (9,413.16 km) |
| Backnang to Castle Pines (Colorado) | 5,133.57 mi (8,261.69 km) |
