| Idaho Falls to Cividale del Friuli | 5,405.29 mi (8,698.98 km) |
| Idaho Falls to Civita Castellana | 5,583.96 mi (8,986.52 km) |
| Idaho Falls to Civitanova Marche | 5,568.89 mi (8,962.27 km) |
| Idaho Falls to Civitavecchia | 5,575.72 mi (8,973.25 km) |
| Idaho Falls to Civitella in Val di Chiana | 5,501.18 mi (8,853.30 km) |
| Idaho Falls to Clusone | 5,313.76 mi (8,551.67 km) |
| Idaho Falls to Coccaglio | 5,331.77 mi (8,580.65 km) |
| Idaho Falls to Codigoro | 5,435.99 mi (8,748.38 km) |
| Idaho Falls to Codogno | 5,344.99 mi (8,601.93 km) |
| Idaho Falls to Codroipo | 5,399.67 mi (8,689.93 km) |
| Idaho Falls to Cogoleto | 5,353.07 mi (8,614.93 km) |
| Idaho Falls to Colle di Val d'Elsa | 5,484.06 mi (8,825.75 km) |
| Idaho Falls to Colle Salvetti | 5,453.01 mi (8,775.77 km) |
| Idaho Falls to Collecchio | 5,382.75 mi (8,662.70 km) |
| Idaho Falls to Colleferro | 5,633.76 mi (9,066.67 km) |
