| Idaho Falls to Collegno | 5,282.76 mi (8,501.77 km) |
| Idaho Falls to Cologno al Serio | 5,322.19 mi (8,565.23 km) |
| Idaho Falls to Cologno Monzese | 5,312.16 mi (8,549.09 km) |
| Idaho Falls to Colorno | 5,378.00 mi (8,655.06 km) |
| Idaho Falls to Comacchio | 5,445.28 mi (8,763.32 km) |
| Idaho Falls to Comiso | 5,950.22 mi (9,575.96 km) |
| Idaho Falls to Como | 5,291.24 mi (8,515.44 km) |
| Idaho Falls to Concordia Sagittaria | 5,406.64 mi (8,701.14 km) |
| Idaho Falls to Concorezzo | 5,310.67 mi (8,546.70 km) |
| Idaho Falls to Conegliano | 5,383.83 mi (8,664.43 km) |
| Idaho Falls to Conselice | 5,444.73 mi (8,762.45 km) |
| Idaho Falls to Conselve | 5,406.68 mi (8,701.21 km) |
| Idaho Falls to Conversano | 5,800.81 mi (9,335.50 km) |
| Idaho Falls to Copertino | 5,868.31 mi (9,444.13 km) |
| Idaho Falls to Copparo | 5,423.84 mi (8,728.82 km) |
