| Sumner to Collegno | 5,370.14 mi (8,642.40 km) |
| Sumner to Cologno al Serio | 5,394.68 mi (8,681.90 km) |
| Sumner to Cologno Monzese | 5,387.34 mi (8,670.09 km) |
| Sumner to Colorno | 5,450.28 mi (8,771.38 km) |
| Sumner to Comacchio | 5,508.45 mi (8,864.99 km) |
| Sumner to Comiso | 6,039.01 mi (9,718.85 km) |
| Sumner to Como | 5,365.89 mi (8,635.57 km) |
| Sumner to Concordia Sagittaria | 5,460.15 mi (8,787.27 km) |
| Sumner to Concorezzo | 5,385.18 mi (8,666.62 km) |
| Sumner to Conegliano | 5,439.86 mi (8,754.61 km) |
| Sumner to Conselice | 5,510.94 mi (8,869.01 km) |
| Sumner to Conselve | 5,468.77 mi (8,801.13 km) |
| Sumner to Conversano | 5,853.33 mi (9,420.03 km) |
| Sumner to Copertino | 5,918.30 mi (9,524.58 km) |
| Sumner to Copparo | 5,487.95 mi (8,832.00 km) |
