| Gurnee to Cortona | 4,721.19 mi (7,598.02 km) |
| Gurnee to Cosenza | 5,067.22 mi (8,154.91 km) |
| Gurnee to Cossato | 4,475.35 mi (7,202.38 km) |
| Gurnee to Costa Volpino | 4,539.88 mi (7,306.24 km) |
| Gurnee to Creazzo | 4,605.59 mi (7,411.98 km) |
| Gurnee to Crema | 4,542.85 mi (7,311.01 km) |
| Gurnee to Cremona | 4,566.14 mi (7,348.49 km) |
| Gurnee to Crevalcore | 4,627.05 mi (7,446.52 km) |
| Gurnee to Crispiano | 5,046.35 mi (8,121.31 km) |
| Gurnee to Crosia | 5,075.55 mi (8,168.31 km) |
| Gurnee to Crotone | 5,111.79 mi (8,226.62 km) |
| Gurnee to Cuneo | 4,498.68 mi (7,239.93 km) |
| Gurnee to Cuorgne | 4,462.11 mi (7,181.07 km) |
| Gurnee to Cusano Milanino | 4,515.83 mi (7,267.52 km) |
| Gurnee to Cutro | 5,108.78 mi (8,221.78 km) |
