| Sumner to Cognac | 5,117.48 mi (8,235.80 km) |
| Sumner to Cogolin | 5,448.78 mi (8,768.97 km) |
| Sumner to Colmar | 5,189.59 mi (8,351.84 km) |
| Sumner to Colombes | 5,009.73 mi (8,062.37 km) |
| Sumner to Colomiers | 5,281.90 mi (8,500.40 km) |
| Sumner to Combs-la-Ville | 5,032.13 mi (8,098.43 km) |
| Sumner to Comines | 4,926.61 mi (7,928.62 km) |
| Sumner to Compiegne | 4,997.29 mi (8,042.37 km) |
| Sumner to Concarneau | 4,894.27 mi (7,876.56 km) |
| Sumner to Conde-sur-l'Escaut | 4,959.02 mi (7,980.77 km) |
| Sumner to Conflans-Sainte-Honorine | 5,001.40 mi (8,048.97 km) |
| Sumner to Corbas | 5,265.20 mi (8,473.53 km) |
| Sumner to Corbeil-Essonnes | 5,033.20 mi (8,100.15 km) |
| Sumner to Cormeilles-en-Parisis | 5,005.56 mi (8,055.67 km) |
| Sumner to Cosne sur Loire | 5,112.78 mi (8,228.23 km) |
