| Harker Heights to Collegno | 5,394.96 mi (8,682.35 km) |
| Harker Heights to Cologno al Serio | 5,462.64 mi (8,791.27 km) |
| Harker Heights to Cologno Monzese | 5,447.71 mi (8,767.23 km) |
| Harker Heights to Colorno | 5,515.26 mi (8,875.96 km) |
| Harker Heights to Comacchio | 5,596.95 mi (9,007.41 km) |
| Harker Heights to Comiso | 6,016.62 mi (9,682.81 km) |
| Harker Heights to Como | 5,429.27 mi (8,737.57 km) |
| Harker Heights to Concordia Sagittaria | 5,580.60 mi (8,981.11 km) |
| Harker Heights to Concorezzo | 5,447.71 mi (8,767.24 km) |
| Harker Heights to Conegliano | 5,554.11 mi (8,938.48 km) |
| Harker Heights to Conselice | 5,590.19 mi (8,996.54 km) |
| Harker Heights to Conselve | 5,563.06 mi (8,952.89 km) |
| Harker Heights to Conversano | 5,951.76 mi (9,578.42 km) |
| Harker Heights to Copertino | 6,020.24 mi (9,688.64 km) |
| Harker Heights to Copparo | 5,574.96 mi (8,972.03 km) |
