| Willimantic to Castle Pines (Colorado) | 1,710.34 mi (2,752.53 km) |
| Willimantic to Castle Rock (Colorado) | 1,711.10 mi (2,753.75 km) |
| Willimantic to Castro Valley (California) | 2,627.01 mi (4,227.77 km) |
| Willimantic to Catalina Foothills (Arizona) | 2,209.86 mi (3,556.42 km) |
| Willimantic to Cataño (Puerto Rico) | 1,647.75 mi (2,651.79 km) |
| Willimantic to Cathedral City (California) | 2,449.26 mi (3,941.70 km) |
| Willimantic to Catonsville (Maryland) | 292.16 mi (470.19 km) |
| Willimantic to Cave Spring (Virginia) | 518.48 mi (834.42 km) |
| Willimantic to Cayce (South Carolina) | 720.69 mi (1,159.84 km) |
| Willimantic to Cayey (Puerto Rico) | 1,669.36 mi (2,686.58 km) |
| Willimantic to Cedar City (Utah) | 2,170.64 mi (3,493.31 km) |
| Willimantic to Cedar Falls (Iowa) | 1,036.44 mi (1,667.99 km) |
| Willimantic to Cedar Hill (Texas) | 1,494.86 mi (2,405.74 km) |
| Willimantic to Cedar Lake (Indiana) | 786.80 mi (1,266.24 km) |
| Willimantic to Cedar Mill (Oregon) | 2,501.76 mi (4,026.20 km) |
