| Howard to Cadillac (Michigan) | 133.94 mi (215.56 km) |
| Howard to Caguas (Puerto Rico) | 2,221.18 mi (3,574.64 km) |
| Howard to Cahokia (Illinois) | 428.67 mi (689.88 km) |
| Howard to Calabasas (California) | 1,772.01 mi (2,851.77 km) |
| Howard to Caldwell (Idaho) | 1,411.42 mi (2,271.46 km) |
| Howard to Caledonia (Wisconsin) | 122.89 mi (197.77 km) |
| Howard to Calera (Alabama) | 794.05 mi (1,277.90 km) |
| Howard to Calexico (California) | 1,680.06 mi (2,703.80 km) |
| Howard to Calhoun (Georgia) | 716.25 mi (1,152.70 km) |
| Howard to California (Maryland) | 739.64 mi (1,190.34 km) |
| Howard to California City (California) | 1,696.00 mi (2,729.45 km) |
| Howard to Callaway (Florida) | 1,006.93 mi (1,620.49 km) |
| Howard to Calumet City (Illinois) | 206.12 mi (331.73 km) |
| Howard to Calverton (Maryland) | 687.80 mi (1,106.91 km) |
| Howard to Camano (Washington) | 1,643.55 mi (2,645.04 km) |
