| Potomac to Carterton | 3,601.19 mi (5,795.56 km) |
| Potomac to Castle Bromwich | 3,578.04 mi (5,758.30 km) |
| Potomac to Castleford | 3,571.30 mi (5,747.45 km) |
| Potomac to Castleton | 3,541.50 mi (5,699.49 km) |
| Potomac to Caterham | 3,673.15 mi (5,911.36 km) |
| Potomac to Catford | 3,671.96 mi (5,909.45 km) |
| Potomac to Caversham | 3,632.59 mi (5,846.09 km) |
| Potomac to Chaddesden | 3,583.46 mi (5,767.02 km) |
| Potomac to Chalfont Saint Peter | 3,646.59 mi (5,868.62 km) |
| Potomac to Chandlers Ford | 3,626.32 mi (5,836.00 km) |
| Potomac to Chapel en le Frith | 3,556.76 mi (5,724.04 km) |
| Potomac to Chapeltown | 3,571.89 mi (5,748.40 km) |
| Potomac to Chard | 3,563.17 mi (5,734.37 km) |
| Potomac to Charlton Kings | 3,580.16 mi (5,761.72 km) |
| Potomac to Chatham | 3,695.69 mi (5,947.63 km) |
