| Idaho Falls to Cassina de' Pecchi | 5,315.51 mi (8,554.49 km) |
| Idaho Falls to Cassino | 5,671.88 mi (9,128.01 km) |
| Idaho Falls to Castagneto Carducci | 5,480.09 mi (8,819.35 km) |
| Idaho Falls to Castano Primo | 5,295.21 mi (8,521.82 km) |
| Idaho Falls to Castel Bolognese | 5,454.63 mi (8,778.38 km) |
| Idaho Falls to Castel Gandolfo | 5,621.69 mi (9,047.24 km) |
| Idaho Falls to Castel Goffredo | 5,361.16 mi (8,627.95 km) |
| Idaho Falls to Castel Maggiore | 5,427.86 mi (8,735.29 km) |
| Idaho Falls to Castel Mella | 5,340.40 mi (8,594.54 km) |
| Idaho Falls to Castel San Giorgio | 5,738.46 mi (9,235.16 km) |
| Idaho Falls to Castel San Giovanni | 5,342.48 mi (8,597.89 km) |
| Idaho Falls to Castel San Pietro Terme | 5,443.51 mi (8,760.48 km) |
| Idaho Falls to Castel Volturno | 5,699.48 mi (9,172.43 km) |
| Idaho Falls to Castelbuono | 5,879.09 mi (9,461.49 km) |
| Idaho Falls to Casteldaccia | 5,854.37 mi (9,421.69 km) |
