| Potomac to Creutzwald | 4,004.20 mi (6,444.14 km) |
| Potomac to Croissy-sur-Seine | 3,823.30 mi (6,153.01 km) |
| Potomac to Croix | 3,819.49 mi (6,146.87 km) |
| Potomac to Crosne | 3,840.98 mi (6,181.45 km) |
| Potomac to Cuers | 4,156.49 mi (6,689.23 km) |
| Potomac to Cugnaux | 3,933.98 mi (6,331.12 km) |
| Potomac to Cusset | 3,953.93 mi (6,363.24 km) |
| Potomac to Dammarie-le-Lys | 3,853.70 mi (6,201.93 km) |
| Potomac to Dammartin-en-Goele | 3,841.44 mi (6,182.20 km) |
| Potomac to Dardilly | 4,020.00 mi (6,469.56 km) |
| Potomac to Darnetal | 3,767.34 mi (6,062.94 km) |
| Potomac to Dax | 3,819.80 mi (6,147.38 km) |
| Potomac to Decines-Charpieu | 4,030.06 mi (6,485.75 km) |
| Potomac to Denain | 3,838.31 mi (6,177.16 km) |
| Potomac to Deuil-la-Barre | 3,828.55 mi (6,161.46 km) |
