| Idaho Falls to Coudekerque-Branche | 4,818.50 mi (7,754.62 km) |
| Idaho Falls to Coueron | 4,870.30 mi (7,837.99 km) |
| Idaho Falls to Coulommiers | 4,949.30 mi (7,965.12 km) |
| Idaho Falls to Courbevoic | 4,918.96 mi (7,916.30 km) |
| Idaho Falls to Courcouronnes | 4,938.12 mi (7,947.14 km) |
| Idaho Falls to Cournon-d'Auvergne | 5,107.16 mi (8,219.18 km) |
| Idaho Falls to Courrieres | 4,863.47 mi (7,827.00 km) |
| Idaho Falls to Coutras | 5,030.05 mi (8,095.08 km) |
| Idaho Falls to Couzeix | 5,035.36 mi (8,103.62 km) |
| Idaho Falls to Cran-Gevrier | 5,193.03 mi (8,357.38 km) |
| Idaho Falls to Craponne | 5,156.85 mi (8,299.15 km) |
| Idaho Falls to Creil | 4,908.41 mi (7,899.32 km) |
| Idaho Falls to Crepy-en-Valois | 4,922.29 mi (7,921.66 km) |
| Idaho Falls to Crest | 5,218.78 mi (8,398.82 km) |
| Idaho Falls to Creteil | 4,930.89 mi (7,935.51 km) |
