| Potomac to Chambray-les-Tours | 3,801.87 mi (6,118.51 km) |
| Potomac to Chamonix-Mont-Blanc | 4,108.27 mi (6,611.62 km) |
| Potomac to Champigny-sur-Marne | 3,840.61 mi (6,180.87 km) |
| Potomac to Champs-Sur-Marne | 3,843.36 mi (6,185.28 km) |
| Potomac to Chanteloup-les-Vignes | 3,816.03 mi (6,141.31 km) |
| Potomac to Chantepie | 3,682.12 mi (5,925.80 km) |
| Potomac to Chantilly | 3,828.76 mi (6,161.80 km) |
| Potomac to Chaponost | 4,022.32 mi (6,473.30 km) |
| Potomac to Charenton-le-Pont | 3,835.71 mi (6,172.97 km) |
| Potomac to Charleville-Mezieres | 3,907.11 mi (6,287.88 km) |
| Potomac to Chartres | 3,806.21 mi (6,125.51 km) |
| Potomac to Chassieu | 4,031.10 mi (6,487.43 km) |
| Potomac to Chateau-d'Olonne | 3,715.50 mi (5,979.53 km) |
| Potomac to Chateau-Gontier | 3,728.01 mi (5,999.65 km) |
| Potomac to Chateau-Thierry | 3,871.89 mi (6,231.21 km) |
