| Idylwood to Castle Pines (Colorado) | 1,476.48 mi (2,376.16 km) |
| Idylwood to Castle Rock (Colorado) | 1,476.35 mi (2,375.95 km) |
| Idylwood to Castro Valley (California) | 2,408.84 mi (3,876.66 km) |
| Idylwood to Catalina Foothills (Arizona) | 1,934.28 mi (3,112.92 km) |
| Idylwood to Cataño (Puerto Rico) | 1,561.14 mi (2,512.41 km) |
| Idylwood to Cathedral City (California) | 2,194.93 mi (3,532.40 km) |
| Idylwood to Catonsville (Maryland) | 35.90 mi (57.77 km) |
| Idylwood to Cave Spring (Virginia) | 190.91 mi (307.24 km) |
| Idylwood to Cayce (South Carolina) | 402.63 mi (647.98 km) |
| Idylwood to Cayey (Puerto Rico) | 1,581.21 mi (2,544.72 km) |
| Idylwood to Cedar City (Utah) | 1,935.62 mi (3,115.07 km) |
| Idylwood to Cedar Falls (Iowa) | 835.75 mi (1,345.01 km) |
| Idylwood to Cedar Hill (Texas) | 1,187.44 mi (1,911.00 km) |
| Idylwood to Cedar Lake (Indiana) | 566.70 mi (912.01 km) |
| Idylwood to Cedar Mill (Oregon) | 2,345.42 mi (3,774.59 km) |
