| Efringen-Kirchen to Caguas (Puerto Rico) | 4,538.08 mi (7,303.34 km) |
| Efringen-Kirchen to Cahokia (Illinois) | 4,633.32 mi (7,456.61 km) |
| Efringen-Kirchen to Calabasas (California) | 5,880.60 mi (9,463.91 km) |
| Efringen-Kirchen to Caldwell (Idaho) | 5,275.33 mi (8,489.82 km) |
| Efringen-Kirchen to Caledonia (Wisconsin) | 4,347.08 mi (6,995.95 km) |
| Efringen-Kirchen to Calera (Alabama) | 4,754.14 mi (7,651.05 km) |
| Efringen-Kirchen to Calexico (California) | 5,862.17 mi (9,434.25 km) |
| Efringen-Kirchen to Calhoun (Georgia) | 4,613.97 mi (7,425.47 km) |
| Efringen-Kirchen to California (Maryland) | 4,087.05 mi (6,577.47 km) |
| Efringen-Kirchen to California City (California) | 5,796.81 mi (9,329.07 km) |
| Efringen-Kirchen to Callaway (Florida) | 4,847.87 mi (7,801.89 km) |
| Efringen-Kirchen to Calumet City (Illinois) | 4,388.59 mi (7,062.76 km) |
| Efringen-Kirchen to Calverton (Maryland) | 4,073.38 mi (6,555.47 km) |
| Efringen-Kirchen to Camano (Washington) | 5,169.01 mi (8,318.72 km) |
| Efringen-Kirchen to Camarillo (California) | 5,886.94 mi (9,474.11 km) |
