| Willimantic to Cordele (Georgia) | 927.45 mi (1,492.59 km) |
| Willimantic to Corinth (Mississippi) | 997.43 mi (1,605.21 km) |
| Willimantic to Corinth (Texas) | 1,480.01 mi (2,381.84 km) |
| Willimantic to Cornelius (North Carolina) | 636.06 mi (1,023.64 km) |
| Willimantic to Cornelius (Oregon) | 2,513.85 mi (4,045.64 km) |
| Willimantic to Corning (New York) | 250.75 mi (403.55 km) |
| Willimantic to Corona (California) | 2,505.21 mi (4,031.74 km) |
| Willimantic to Coronado (California) | 2,521.68 mi (4,058.25 km) |
| Willimantic to Corpus Christi (Texas) | 1,715.03 mi (2,760.08 km) |
| Willimantic to Corsicana (Texas) | 1,489.30 mi (2,396.80 km) |
| Willimantic to Cortland (New York) | 212.13 mi (341.38 km) |
| Willimantic to Corvallis (Oregon) | 2,539.75 mi (4,087.33 km) |
| Willimantic to Coshocton (Ohio) | 512.25 mi (824.39 km) |
| Willimantic to Costa Mesa (California) | 2,529.12 mi (4,070.23 km) |
| Willimantic to Coto de Caza (California) | 2,514.42 mi (4,046.57 km) |
