| Mastic Beach to Cividale del Friuli | 4,124.24 mi (6,637.32 km) |
| Mastic Beach to Civita Castellana | 4,209.98 mi (6,775.32 km) |
| Mastic Beach to Civitanova Marche | 4,232.82 mi (6,812.07 km) |
| Mastic Beach to Civitavecchia | 4,189.81 mi (6,742.85 km) |
| Mastic Beach to Civitella in Val di Chiana | 4,141.00 mi (6,664.29 km) |
| Mastic Beach to Clusone | 3,983.72 mi (6,411.17 km) |
| Mastic Beach to Coccaglio | 3,995.07 mi (6,429.45 km) |
| Mastic Beach to Codigoro | 4,110.66 mi (6,615.47 km) |
| Mastic Beach to Codogno | 3,996.14 mi (6,431.16 km) |
| Mastic Beach to Codroipo | 4,109.73 mi (6,613.97 km) |
| Mastic Beach to Cogoleto | 3,974.58 mi (6,396.47 km) |
| Mastic Beach to Colle di Val d'Elsa | 4,116.01 mi (6,624.08 km) |
| Mastic Beach to Colle Salvetti | 4,080.82 mi (6,567.44 km) |
| Mastic Beach to Collecchio | 4,031.47 mi (6,488.02 km) |
| Mastic Beach to Colleferro | 4,256.57 mi (6,850.29 km) |
