| Potomac to Cervignano del Friuli | 4,386.18 mi (7,058.88 km) |
| Potomac to Cesa | 4,597.49 mi (7,398.95 km) |
| Potomac to Cesano Maderno | 4,215.23 mi (6,783.76 km) |
| Potomac to Cesena | 4,397.78 mi (7,077.55 km) |
| Potomac to Cesenatico | 4,402.12 mi (7,084.53 km) |
| Potomac to Cetraro | 4,728.50 mi (7,609.79 km) |
| Potomac to Cherasco | 4,191.18 mi (6,745.06 km) |
| Potomac to Chiampo | 4,308.99 mi (6,934.65 km) |
| Potomac to Chiaravalle | 4,463.40 mi (7,183.14 km) |
| Potomac to Chiari | 4,250.37 mi (6,840.31 km) |
| Potomac to Chiavari | 4,265.87 mi (6,865.25 km) |
| Potomac to Chieri | 4,177.73 mi (6,723.41 km) |
| Potomac to Chieti | 4,544.11 mi (7,313.04 km) |
| Potomac to Chioggia | 4,362.31 mi (7,020.46 km) |
| Potomac to Chiusi | 4,423.85 mi (7,119.50 km) |
