| Idaho Falls to Castrovillari | 5,838.68 mi (9,396.45 km) |
| Idaho Falls to Catania | 5,935.01 mi (9,551.47 km) |
| Idaho Falls to Catanzaro | 5,902.89 mi (9,499.79 km) |
| Idaho Falls to Cattolica | 5,502.02 mi (8,854.64 km) |
| Idaho Falls to Cava de' Tirreni | 5,743.13 mi (9,242.67 km) |
| Idaho Falls to Cavallino | 5,869.84 mi (9,446.60 km) |
| Idaho Falls to Cavarzere | 5,418.36 mi (8,720.01 km) |
| Idaho Falls to Cave | 5,626.58 mi (9,055.10 km) |
| Idaho Falls to Cavriago | 5,395.18 mi (8,682.70 km) |
| Idaho Falls to Cavriglia | 5,488.54 mi (8,832.95 km) |
| Idaho Falls to Cazzago San Martino | 5,332.23 mi (8,581.39 km) |
| Idaho Falls to Ceccano | 5,652.77 mi (9,097.26 km) |
| Idaho Falls to Cecina | 5,469.37 mi (8,802.09 km) |
| Idaho Falls to Cefalu | 5,870.84 mi (9,448.20 km) |
| Idaho Falls to Ceglie Messapico | 5,830.18 mi (9,382.77 km) |
