| Knightdale to Collegno | 4,355.65 mi (7,009.75 km) |
| Knightdale to Cologno al Serio | 4,434.20 mi (7,136.16 km) |
| Knightdale to Cologno Monzese | 4,417.44 mi (7,109.19 km) |
| Knightdale to Colorno | 4,483.79 mi (7,215.97 km) |
| Knightdale to Comacchio | 4,569.73 mi (7,354.27 km) |
| Knightdale to Comiso | 4,943.38 mi (7,955.61 km) |
| Knightdale to Como | 4,400.71 mi (7,082.25 km) |
| Knightdale to Concordia Sagittaria | 4,564.49 mi (7,345.83 km) |
| Knightdale to Concorezzo | 4,418.14 mi (7,110.31 km) |
| Knightdale to Conegliano | 4,537.04 mi (7,301.66 km) |
| Knightdale to Conselice | 4,560.29 mi (7,339.08 km) |
| Knightdale to Conselve | 4,539.07 mi (7,304.93 km) |
| Knightdale to Conversano | 4,914.21 mi (7,908.66 km) |
| Knightdale to Copertino | 4,981.29 mi (8,016.62 km) |
| Knightdale to Copparo | 4,548.14 mi (7,319.53 km) |
