| Howard to Castle Pines (Colorado) | 928.57 mi (1,494.39 km) |
| Howard to Castle Rock (Colorado) | 930.55 mi (1,497.58 km) |
| Howard to Castro Valley (California) | 1,815.69 mi (2,922.06 km) |
| Howard to Catalina Foothills (Arizona) | 1,488.27 mi (2,395.14 km) |
| Howard to Cataño (Puerto Rico) | 2,205.43 mi (3,549.30 km) |
| Howard to Cathedral City (California) | 1,678.74 mi (2,701.68 km) |
| Howard to Catonsville (Maryland) | 688.18 mi (1,107.52 km) |
| Howard to Cave Spring (Virginia) | 659.50 mi (1,061.36 km) |
| Howard to Cayce (South Carolina) | 824.51 mi (1,326.92 km) |
| Howard to Cayey (Puerto Rico) | 2,224.08 mi (3,579.32 km) |
| Howard to Cedar City (Utah) | 1,378.87 mi (2,219.08 km) |
| Howard to Cedar Falls (Iowa) | 260.28 mi (418.88 km) |
| Howard to Cedar Hill (Texas) | 955.49 mi (1,537.71 km) |
| Howard to Cedar Lake (Indiana) | 223.60 mi (359.85 km) |
| Howard to Cedar Mill (Oregon) | 1,682.19 mi (2,707.22 km) |
