| Potomac to Chicago Ridge (Illinois) | 587.00 mi (944.68 km) |
| Potomac to Chickasha (Oklahoma) | 1,174.38 mi (1,889.98 km) |
| Potomac to Chico (California) | 2,358.31 mi (3,795.33 km) |
| Potomac to Chicopee (Massachusetts) | 326.33 mi (525.17 km) |
| Potomac to Chillicothe (Ohio) | 311.39 mi (501.14 km) |
| Potomac to Chillum (Maryland) | 12.01 mi (19.33 km) |
| Potomac to Chino (California) | 2,255.81 mi (3,630.37 km) |
| Potomac to Chino Hills (California) | 2,259.83 mi (3,636.84 km) |
| Potomac to Chino Valley (Arizona) | 1,955.93 mi (3,147.77 km) |
| Potomac to Chippewa Falls (Wisconsin) | 834.44 mi (1,342.90 km) |
| Potomac to Choctaw (Oklahoma) | 1,128.16 mi (1,815.60 km) |
| Potomac to Chowchilla (California) | 2,323.23 mi (3,738.87 km) |
| Potomac to Christiansburg (Virginia) | 217.29 mi (349.69 km) |
| Potomac to Chubbuck (Idaho) | 1,845.88 mi (2,970.66 km) |
| Potomac to Chula Vista (California) | 2,255.62 mi (3,630.07 km) |
