| North Potomac to Cortona | 4,415.10 mi (7,105.42 km) |
| North Potomac to Cosenza | 4,748.25 mi (7,641.57 km) |
| North Potomac to Cossato | 4,173.71 mi (6,716.94 km) |
| North Potomac to Costa Volpino | 4,247.89 mi (6,836.31 km) |
| North Potomac to Creazzo | 4,316.40 mi (6,946.57 km) |
| North Potomac to Crema | 4,245.23 mi (6,832.04 km) |
| North Potomac to Cremona | 4,267.86 mi (6,868.45 km) |
| North Potomac to Crevalcore | 4,329.60 mi (6,967.81 km) |
| North Potomac to Crispiano | 4,741.59 mi (7,630.85 km) |
| North Potomac to Crosia | 4,760.89 mi (7,661.92 km) |
| North Potomac to Crotone | 4,795.10 mi (7,716.97 km) |
| North Potomac to Cuneo | 4,184.44 mi (6,734.20 km) |
| North Potomac to Cuorgne | 4,156.98 mi (6,690.02 km) |
| North Potomac to Cusano Milanino | 4,217.89 mi (6,788.04 km) |
| North Potomac to Cutro | 4,791.11 mi (7,710.55 km) |
