| Potomac to Chenove | 3,987.95 mi (6,417.99 km) |
| Potomac to Cherbourg | 3,646.96 mi (5,869.22 km) |
| Potomac to Chevigny-Saint-Sauveur | 3,993.13 mi (6,426.32 km) |
| Potomac to Chevilly-Larue | 3,835.08 mi (6,171.97 km) |
| Potomac to Chilly-Mazarin | 3,835.01 mi (6,171.86 km) |
| Potomac to Choisy-le-Roi | 3,837.52 mi (6,175.89 km) |
| Potomac to Cholet | 3,739.46 mi (6,018.08 km) |
| Potomac to Clamart | 3,830.36 mi (6,164.36 km) |
| Potomac to Claye-Souilly | 3,844.50 mi (6,187.12 km) |
| Potomac to Clermont | 3,821.83 mi (6,150.64 km) |
| Potomac to Clermont-Ferrand | 3,947.52 mi (6,352.92 km) |
| Potomac to Clermont-l'Herault | 4,025.95 mi (6,479.15 km) |
| Potomac to Clichy | 3,829.54 mi (6,163.05 km) |
| Potomac to Clichy-sous-Bois | 3,839.78 mi (6,179.53 km) |
| Potomac to Cluses | 4,091.56 mi (6,584.73 km) |
