| Upminster to Cicero (Illinois) | 3,966.90 mi (6,384.11 km) |
| Upminster to Cimarron Hills (Colorado) | 4,732.92 mi (7,616.89 km) |
| Upminster to Cincinnati (Ohio) | 3,967.44 mi (6,384.97 km) |
| Upminster to Cinco Ranch (Texas) | 4,878.76 mi (7,851.61 km) |
| Upminster to Circleville (Ohio) | 3,883.73 mi (6,250.26 km) |
| Upminster to Citrus (California) | 5,435.38 mi (8,747.40 km) |
| Upminster to Citrus Heights (California) | 5,276.02 mi (8,490.94 km) |
| Upminster to Citrus Park (Florida) | 4,427.12 mi (7,124.76 km) |
| Upminster to Claiborne (Louisiana) | 4,594.24 mi (7,393.71 km) |
| Upminster to Claremont (California) | 5,429.25 mi (8,737.53 km) |
| Upminster to Claremont (New Hampshire) | 3,294.98 mi (5,302.76 km) |
| Upminster to Claremore (Oklahoma) | 4,534.38 mi (7,297.38 km) |
| Upminster to Clarksburg (Maryland) | 3,673.99 mi (5,912.71 km) |
| Upminster to Clarksburg (West Virginia) | 3,794.52 mi (6,106.70 km) |
| Upminster to Clarksdale (Mississippi) | 4,446.51 mi (7,155.97 km) |
