| Potomac to Carmignano | 4,355.74 mi (7,009.88 km) |
| Potomac to Carovigno | 4,758.02 mi (7,657.30 km) |
| Potomac to Carpenedolo | 4,278.87 mi (6,886.17 km) |
| Potomac to Carpi | 4,317.45 mi (6,948.27 km) |
| Potomac to Carrara | 4,307.07 mi (6,931.56 km) |
| Potomac to Carugate | 4,225.86 mi (6,800.86 km) |
| Potomac to Casal di Principe | 4,591.24 mi (7,388.88 km) |
| Potomac to Casale Monferrato | 4,201.49 mi (6,761.65 km) |
| Potomac to Casale sul Sile | 4,351.72 mi (7,003.42 km) |
| Potomac to Casalecchio di Reno | 4,344.71 mi (6,992.14 km) |
| Potomac to Casalgrande | 4,317.68 mi (6,948.63 km) |
| Potomac to Casalmaggiore | 4,290.61 mi (6,905.07 km) |
| Potomac to Casalnuovo di Napoli | 4,604.48 mi (7,410.20 km) |
| Potomac to Casalpusterlengo | 4,251.47 mi (6,842.09 km) |
| Potomac to Casaluce | 4,594.80 mi (7,394.61 km) |
