| Upminster to Caguas (Puerto Rico) | 4,225.14 mi (6,799.70 km) |
| Upminster to Cahokia (Illinois) | 4,215.62 mi (6,784.39 km) |
| Upminster to Calabasas (California) | 5,458.98 mi (8,785.37 km) |
| Upminster to Caldwell (Idaho) | 4,857.93 mi (7,818.09 km) |
| Upminster to Caledonia (Wisconsin) | 3,926.97 mi (6,319.85 km) |
| Upminster to Calera (Alabama) | 4,347.09 mi (6,995.97 km) |
| Upminster to Calexico (California) | 5,438.88 mi (8,753.03 km) |
| Upminster to Calhoun (Georgia) | 4,207.09 mi (6,770.66 km) |
| Upminster to California (Maryland) | 3,684.48 mi (5,929.60 km) |
| Upminster to California City (California) | 5,375.20 mi (8,650.56 km) |
| Upminster to Callaway (Florida) | 4,447.75 mi (7,157.96 km) |
| Upminster to Calumet City (Illinois) | 3,969.75 mi (6,388.69 km) |
| Upminster to Calverton (Maryland) | 3,668.61 mi (5,904.06 km) |
| Upminster to Camano (Washington) | 4,761.94 mi (7,663.60 km) |
| Upminster to Camarillo (California) | 5,465.54 mi (8,795.94 km) |
