| Oro Valley to Collegno | 5,842.78 mi (9,403.05 km) |
| Oro Valley to Cologno al Serio | 5,895.29 mi (9,487.55 km) |
| Oro Valley to Cologno Monzese | 5,882.97 mi (9,467.73 km) |
| Oro Valley to Colorno | 5,950.31 mi (9,576.09 km) |
| Oro Valley to Comacchio | 6,024.65 mi (9,695.74 km) |
| Oro Valley to Comiso | 6,496.52 mi (10,455.13 km) |
| Oro Valley to Como | 5,862.93 mi (9,435.47 km) |
| Oro Valley to Concordia Sagittaria | 5,995.25 mi (9,648.42 km) |
| Oro Valley to Concorezzo | 5,882.13 mi (9,466.38 km) |
| Oro Valley to Conegliano | 5,970.61 mi (9,608.77 km) |
| Oro Valley to Conselice | 6,021.38 mi (9,690.48 km) |
| Oro Valley to Conselve | 5,987.70 mi (9,636.27 km) |
| Oro Valley to Conversano | 6,383.68 mi (10,273.54 km) |
| Oro Valley to Copertino | 6,452.33 mi (10,384.02 km) |
| Oro Valley to Copparo | 6,002.74 mi (9,660.48 km) |
