| Portland to Coudekerque-Branche | 5,004.35 mi (8,053.72 km) |
| Portland to Coueron | 5,097.91 mi (8,204.30 km) |
| Portland to Coulommiers | 5,145.30 mi (8,280.57 km) |
| Portland to Courbevoic | 5,118.32 mi (8,237.13 km) |
| Portland to Courcouronnes | 5,138.30 mi (8,269.29 km) |
| Portland to Cournon-d'Auvergne | 5,320.45 mi (8,562.43 km) |
| Portland to Courrieres | 5,050.28 mi (8,127.64 km) |
| Portland to Coutras | 5,263.25 mi (8,470.38 km) |
| Portland to Couzeix | 5,257.25 mi (8,460.72 km) |
| Portland to Cran-Gevrier | 5,391.15 mi (8,676.22 km) |
| Portland to Craponne | 5,362.68 mi (8,630.40 km) |
| Portland to Creil | 5,104.55 mi (8,214.98 km) |
| Portland to Crepy-en-Valois | 5,116.72 mi (8,234.56 km) |
| Portland to Crest | 5,428.78 mi (8,736.78 km) |
| Portland to Creteil | 5,129.92 mi (8,255.81 km) |
