| Potomac to Chojnice | 4,284.57 mi (6,895.35 km) |
| Potomac to Chojnow | 4,305.88 mi (6,929.64 km) |
| Potomac to Chorzow | 4,453.39 mi (7,167.04 km) |
| Potomac to Choszczno | 4,224.54 mi (6,798.75 km) |
| Potomac to Chrzanow | 4,476.38 mi (7,204.03 km) |
| Potomac to Ciechanow | 4,423.66 mi (7,119.20 km) |
| Potomac to Ciechocinek | 4,356.61 mi (7,011.29 km) |
| Potomac to Cieszyn | 4,461.00 mi (7,179.28 km) |
| Potomac to Czarna Bialostocka | 4,501.25 mi (7,244.06 km) |
| Potomac to Czarnkow | 4,275.38 mi (6,880.56 km) |
| Potomac to Czechowice-Dziedzice | 4,469.38 mi (7,192.77 km) |
| Potomac to Czeladz | 4,457.24 mi (7,173.23 km) |
| Potomac to Czersk Pomorski | 4,296.65 mi (6,914.79 km) |
| Potomac to Czestochowa | 4,441.84 mi (7,148.45 km) |
| Potomac to Czluchow | 4,279.10 mi (6,886.54 km) |
