| Willimantic to Cadillac (Michigan) | 689.15 mi (1,109.07 km) |
| Willimantic to Caguas (Puerto Rico) | 1,663.03 mi (2,676.38 km) |
| Willimantic to Cahokia (Illinois) | 971.77 mi (1,563.91 km) |
| Willimantic to Calabasas (California) | 2,553.70 mi (4,109.79 km) |
| Willimantic to Caldwell (Idaho) | 2,234.46 mi (3,596.01 km) |
| Willimantic to Caledonia (Wisconsin) | 803.37 mi (1,292.90 km) |
| Willimantic to Calera (Alabama) | 991.89 mi (1,596.29 km) |
| Willimantic to Calexico (California) | 2,435.12 mi (3,918.94 km) |
| Willimantic to Calhoun (Georgia) | 851.78 mi (1,370.81 km) |
| Willimantic to California (Maryland) | 327.38 mi (526.87 km) |
| Willimantic to California City (California) | 2,482.71 mi (3,995.54 km) |
| Willimantic to Callaway (Florida) | 1,091.86 mi (1,757.18 km) |
| Willimantic to Calumet City (Illinois) | 790.72 mi (1,272.54 km) |
| Willimantic to Calverton (Maryland) | 309.63 mi (498.29 km) |
| Willimantic to Camano (Washington) | 2,452.69 mi (3,947.22 km) |
