| Clayton to Cortona | 958.79 mi (1,543.02 km) |
| Clayton to Cosenza | 1,310.68 mi (2,109.33 km) |
| Clayton to Cossato | 720.60 mi (1,159.70 km) |
| Clayton to Costa Volpino | 762.27 mi (1,226.75 km) |
| Clayton to Creazzo | 821.25 mi (1,321.68 km) |
| Clayton to Crema | 774.88 mi (1,247.05 km) |
| Clayton to Cremona | 798.02 mi (1,284.30 km) |
| Clayton to Crevalcore | 854.24 mi (1,374.77 km) |
| Clayton to Crispiano | 1,268.64 mi (2,041.67 km) |
| Clayton to Crosia | 1,311.30 mi (2,110.34 km) |
| Clayton to Crotone | 1,349.38 mi (2,171.62 km) |
| Clayton to Cuneo | 773.96 mi (1,245.57 km) |
| Clayton to Cuorgne | 716.96 mi (1,153.83 km) |
| Clayton to Cusano Milanino | 750.18 mi (1,207.30 km) |
| Clayton to Cutro | 1,348.13 mi (2,169.60 km) |
