| Upminster to Cookeville (Tennessee) | 4,149.71 mi (6,678.32 km) |
| Upminster to Coolidge (Arizona) | 5,290.51 mi (8,514.26 km) |
| Upminster to Coon Rapids (Minnesota) | 4,015.02 mi (6,461.55 km) |
| Upminster to Cooper City (Florida) | 4,433.53 mi (7,135.08 km) |
| Upminster to Coos Bay (Oregon) | 5,086.41 mi (8,185.78 km) |
| Upminster to Copiague (New York) | 3,452.37 mi (5,556.05 km) |
| Upminster to Coppell (Texas) | 4,758.82 mi (7,658.59 km) |
| Upminster to Copperas Cove (Texas) | 4,890.48 mi (7,870.47 km) |
| Upminster to Coral Gables (Florida) | 4,450.25 mi (7,161.99 km) |
| Upminster to Coral Springs (Florida) | 4,421.07 mi (7,115.03 km) |
| Upminster to Coral Terrace (Florida) | 4,449.50 mi (7,160.79 km) |
| Upminster to Coralville (Iowa) | 4,117.95 mi (6,627.19 km) |
| Upminster to Coram (New York) | 3,427.50 mi (5,516.03 km) |
| Upminster to Corcoran (California) | 5,374.83 mi (8,649.95 km) |
| Upminster to Cordele (Georgia) | 4,283.72 mi (6,893.98 km) |
