| Boppard to Castle Rock (Colorado) | 5,016.98 mi (8,074.05 km) |
| Boppard to Castro Valley (California) | 5,633.60 mi (9,066.41 km) |
| Boppard to Catalina Foothills (Arizona) | 5,610.34 mi (9,028.97 km) |
| Boppard to Cataño (Puerto Rico) | 4,532.69 mi (7,294.66 km) |
| Boppard to Cathedral City (California) | 5,700.53 mi (9,174.11 km) |
| Boppard to Catonsville (Maryland) | 3,981.89 mi (6,408.24 km) |
| Boppard to Cave Spring (Virginia) | 4,207.79 mi (6,771.78 km) |
| Boppard to Cayce (South Carolina) | 4,406.56 mi (7,091.68 km) |
| Boppard to Cayey (Puerto Rico) | 4,550.00 mi (7,322.51 km) |
| Boppard to Cedar City (Utah) | 5,374.73 mi (8,649.79 km) |
| Boppard to Cedar Falls (Iowa) | 4,426.94 mi (7,124.47 km) |
| Boppard to Cedar Hill (Texas) | 5,101.16 mi (8,209.52 km) |
| Boppard to Cedar Lake (Indiana) | 4,299.72 mi (6,919.74 km) |
| Boppard to Cedar Mill (Oregon) | 5,184.52 mi (8,343.68 km) |
| Boppard to Cedar Park (Texas) | 5,243.49 mi (8,438.59 km) |
