| Effingham to Commerce (California) | 1,672.68 mi (2,691.92 km) |
| Effingham to Commerce City (Colorado) | 869.01 mi (1,398.53 km) |
| Effingham to Compton (California) | 1,679.28 mi (2,702.53 km) |
| Effingham to Comstock Park (Michigan) | 309.58 mi (498.22 km) |
| Effingham to Concord (California) | 1,799.11 mi (2,895.39 km) |
| Effingham to Concord (Missouri) | 105.96 mi (170.52 km) |
| Effingham to Concord (New Hampshire) | 926.23 mi (1,490.62 km) |
| Effingham to Concord (North Carolina) | 505.41 mi (813.38 km) |
| Effingham to Conneaut (Ohio) | 461.67 mi (742.99 km) |
| Effingham to Connersville (Indiana) | 185.82 mi (299.05 km) |
| Effingham to Conroe (Texas) | 723.57 mi (1,164.48 km) |
| Effingham to Converse (Texas) | 865.50 mi (1,392.89 km) |
| Effingham to Conway (Arkansas) | 353.11 mi (568.28 km) |
| Effingham to Conway (Florida) | 842.22 mi (1,355.43 km) |
| Effingham to Conway (South Carolina) | 641.38 mi (1,032.20 km) |
