| Potomac to Caltagirone | 4,749.88 mi (7,644.19 km) |
| Potomac to Caltanissetta | 4,719.63 mi (7,595.51 km) |
| Potomac to Calvisano | 4,275.71 mi (6,881.09 km) |
| Potomac to Calvizzano | 4,597.73 mi (7,399.33 km) |
| Potomac to Camaiore | 4,320.64 mi (6,953.40 km) |
| Potomac to Cameri | 4,198.13 mi (6,756.23 km) |
| Potomac to Camisano Vicentino | 4,328.47 mi (6,966.00 km) |
| Potomac to Campagna | 4,646.86 mi (7,478.40 km) |
| Potomac to Campagnano di Roma | 4,473.83 mi (7,199.93 km) |
| Potomac to Campi Bisenzio | 4,360.80 mi (7,018.03 km) |
| Potomac to Campi Salentina | 4,784.85 mi (7,700.48 km) |
| Potomac to Campiglia Marittima | 4,363.74 mi (7,022.77 km) |
| Potomac to Campobasso | 4,594.50 mi (7,394.13 km) |
| Potomac to Campobello di Licata | 4,722.05 mi (7,599.41 km) |
| Potomac to Campobello di Mazara | 4,653.95 mi (7,489.80 km) |
