| Humacao to Castle Pines (Colorado) | 2,753.33 mi (4,431.06 km) |
| Humacao to Castle Rock (Colorado) | 2,750.36 mi (4,426.28 km) |
| Humacao to Castro Valley (California) | 3,629.74 mi (5,841.51 km) |
| Humacao to Catalina Foothills (Arizona) | 2,956.90 mi (4,758.67 km) |
| Humacao to Cataño (Puerto Rico) | 28.98 mi (46.64 km) |
| Humacao to Cathedral City (California) | 3,290.49 mi (5,295.53 km) |
| Humacao to Catonsville (Maryland) | 1,598.81 mi (2,573.04 km) |
| Humacao to Cave Spring (Virginia) | 1,573.68 mi (2,532.59 km) |
| Humacao to Cayce (South Carolina) | 1,439.78 mi (2,317.10 km) |
| Humacao to Cayey (Puerto Rico) | 22.64 mi (36.44 km) |
| Humacao to Cedar City (Utah) | 3,145.08 mi (5,061.52 km) |
| Humacao to Cedar Falls (Iowa) | 2,295.05 mi (3,693.52 km) |
| Humacao to Cedar Hill (Texas) | 2,173.02 mi (3,497.14 km) |
| Humacao to Cedar Lake (Indiana) | 2,050.31 mi (3,299.65 km) |
| Humacao to Cedar Mill (Oregon) | 3,744.41 mi (6,026.05 km) |
