| Highlands Ranch to Collegno | 5,250.72 mi (8,450.23 km) |
| Highlands Ranch to Cologno al Serio | 5,301.87 mi (8,532.54 km) |
| Highlands Ranch to Cologno Monzese | 5,289.77 mi (8,513.06 km) |
| Highlands Ranch to Colorno | 5,357.01 mi (8,621.27 km) |
| Highlands Ranch to Comacchio | 5,430.77 mi (8,739.98 km) |
| Highlands Ranch to Comiso | 5,907.06 mi (9,506.50 km) |
| Highlands Ranch to Como | 5,269.63 mi (8,480.64 km) |
| Highlands Ranch to Concordia Sagittaria | 5,400.68 mi (8,691.55 km) |
| Highlands Ranch to Concorezzo | 5,288.87 mi (8,511.61 km) |
| Highlands Ranch to Conegliano | 5,376.15 mi (8,652.07 km) |
| Highlands Ranch to Conselice | 5,427.73 mi (8,735.09 km) |
| Highlands Ranch to Conselve | 5,393.66 mi (8,680.25 km) |
| Highlands Ranch to Conversano | 5,789.73 mi (9,317.67 km) |
| Highlands Ranch to Copertino | 5,858.32 mi (9,428.06 km) |
| Highlands Ranch to Copparo | 5,408.89 mi (8,704.76 km) |
