| Rockville Centre to Collegno | 3,944.92 mi (6,348.74 km) |
| Rockville Centre to Cologno al Serio | 4,020.92 mi (6,471.05 km) |
| Rockville Centre to Cologno Monzese | 4,004.56 mi (6,444.72 km) |
| Rockville Centre to Colorno | 4,071.31 mi (6,552.14 km) |
| Rockville Centre to Comacchio | 4,156.40 mi (6,689.08 km) |
| Rockville Centre to Comiso | 4,544.53 mi (7,313.71 km) |
| Rockville Centre to Como | 3,987.40 mi (6,417.11 km) |
| Rockville Centre to Concordia Sagittaria | 4,148.78 mi (6,676.81 km) |
| Rockville Centre to Concorezzo | 4,005.10 mi (6,445.58 km) |
| Rockville Centre to Conegliano | 4,121.47 mi (6,632.87 km) |
| Rockville Centre to Conselice | 4,147.56 mi (6,674.86 km) |
| Rockville Centre to Conselve | 4,124.97 mi (6,638.49 km) |
| Rockville Centre to Conversano | 4,503.92 mi (7,248.37 km) |
| Rockville Centre to Copertino | 4,571.48 mi (7,357.08 km) |
| Rockville Centre to Copparo | 4,134.68 mi (6,654.13 km) |
