| Idaho Falls to Casamassima | 5,795.84 mi (9,327.51 km) |
| Idaho Falls to Casandrino | 5,716.26 mi (9,199.43 km) |
| Idaho Falls to Casapulla | 5,709.84 mi (9,189.10 km) |
| Idaho Falls to Casarano | 5,886.09 mi (9,472.75 km) |
| Idaho Falls to Casatenovo | 5,304.14 mi (8,536.19 km) |
| Idaho Falls to Casciana Terme | 5,461.14 mi (8,788.85 km) |
| Idaho Falls to Cascina | 5,450.59 mi (8,771.87 km) |
| Idaho Falls to Caselle Torinese | 5,279.84 mi (8,497.08 km) |
| Idaho Falls to Caserta | 5,711.37 mi (9,191.57 km) |
| Idaho Falls to Casier | 5,396.84 mi (8,685.37 km) |
| Idaho Falls to Casorate Primo | 5,315.35 mi (8,554.24 km) |
| Idaho Falls to Casoria | 5,719.66 mi (9,204.90 km) |
| Idaho Falls to Cassano al Ionio | 5,844.12 mi (9,405.20 km) |
| Idaho Falls to Cassano d'Adda | 5,319.24 mi (8,560.49 km) |
| Idaho Falls to Cassano delle Murge | 5,795.19 mi (9,326.45 km) |
