| Potomac to Coswig | 4,152.96 mi (6,683.54 km) |
| Potomac to Cottbus | 4,229.16 mi (6,806.17 km) |
| Potomac to Crailsheim | 4,144.10 mi (6,669.29 km) |
| Potomac to Cremlingen | 4,073.91 mi (6,556.33 km) |
| Potomac to Crimmitschau | 4,184.14 mi (6,733.72 km) |
| Potomac to Cuxhaven | 3,954.35 mi (6,363.90 km) |
| Potomac to Dachau | 4,226.91 mi (6,802.55 km) |
| Potomac to Dallgow-Doberitz | 4,156.42 mi (6,689.11 km) |
| Potomac to Damme | 3,971.74 mi (6,391.90 km) |
| Potomac to Darmstadt | 4,064.69 mi (6,541.48 km) |
| Potomac to Dassel | 4,049.65 mi (6,517.29 km) |
| Potomac to Datteln | 3,962.00 mi (6,376.22 km) |
| Potomac to Dautphe | 4,032.02 mi (6,488.91 km) |
| Potomac to Deggendorf | 4,270.38 mi (6,872.52 km) |
| Potomac to Delbruck | 4,006.93 mi (6,448.53 km) |
