| Efringen-Kirchen to Carlsbad (New Mexico) | 5,482.60 mi (8,823.39 km) |
| Efringen-Kirchen to Carmel (Indiana) | 4,408.96 mi (7,095.54 km) |
| Efringen-Kirchen to Carmichael (California) | 5,698.04 mi (9,170.11 km) |
| Efringen-Kirchen to Carney (Maryland) | 4,040.64 mi (6,502.79 km) |
| Efringen-Kirchen to Carnot-Moon (Pennsylvania) | 4,145.60 mi (6,671.70 km) |
| Efringen-Kirchen to Carol Stream (Illinois) | 4,397.03 mi (7,076.34 km) |
| Efringen-Kirchen to Carolina (Puerto Rico) | 4,526.86 mi (7,285.28 km) |
| Efringen-Kirchen to Carolina Forest (South Carolina) | 4,391.92 mi (7,068.11 km) |
| Efringen-Kirchen to Carpentersville (Illinois) | 4,393.75 mi (7,071.06 km) |
| Efringen-Kirchen to Carpinteria (California) | 5,891.68 mi (9,481.74 km) |
| Efringen-Kirchen to Carrboro (North Carolina) | 4,301.56 mi (6,922.68 km) |
| Efringen-Kirchen to Carroll (Iowa) | 4,642.71 mi (7,471.72 km) |
| Efringen-Kirchen to Carrollton (Georgia) | 4,662.96 mi (7,504.30 km) |
| Efringen-Kirchen to Carrollton (Texas) | 5,171.85 mi (8,323.28 km) |
| Efringen-Kirchen to Carrollwood (Florida) | 4,816.33 mi (7,751.13 km) |
