| Allentown to Coudekerque-Branche | 3,639.84 mi (5,857.75 km) |
| Allentown to Coueron | 3,561.54 mi (5,731.74 km) |
| Allentown to Coulommiers | 3,725.55 mi (5,995.69 km) |
| Allentown to Courbevoic | 3,688.52 mi (5,936.10 km) |
| Allentown to Courcouronnes | 3,703.20 mi (5,959.72 km) |
| Allentown to Cournon-d'Auvergne | 3,816.74 mi (6,142.46 km) |
| Allentown to Courrieres | 3,676.74 mi (5,917.14 km) |
| Allentown to Coutras | 3,689.78 mi (5,938.13 km) |
| Allentown to Couzeix | 3,727.05 mi (5,998.11 km) |
| Allentown to Cran-Gevrier | 3,938.01 mi (6,337.62 km) |
| Allentown to Craponne | 3,883.13 mi (6,249.29 km) |
| Allentown to Creil | 3,688.68 mi (5,936.36 km) |
| Allentown to Crepy-en-Valois | 3,706.16 mi (5,964.49 km) |
| Allentown to Crest | 3,927.16 mi (6,320.16 km) |
| Allentown to Creteil | 3,700.15 mi (5,954.82 km) |
