| North Potomac to Castelfidardo | 4,475.85 mi (7,203.18 km) |
| North Potomac to Castelfiorentino | 4,359.50 mi (7,015.94 km) |
| North Potomac to Castelfranco di Sopra | 4,384.40 mi (7,056.01 km) |
| North Potomac to Castelfranco di Sotto | 4,346.67 mi (6,995.29 km) |
| North Potomac to Castelfranco Emilia | 4,329.46 mi (6,967.60 km) |
| North Potomac to Castelfranco Veneto | 4,330.94 mi (6,969.97 km) |
| North Potomac to Castellabate | 4,653.56 mi (7,489.18 km) |
| North Potomac to Castellammare del Golfo | 4,644.36 mi (7,474.37 km) |
| North Potomac to Castellammare di Stabia | 4,617.16 mi (7,430.60 km) |
| North Potomac to Castellamonte | 4,159.92 mi (6,694.74 km) |
| North Potomac to Castellana Grotte | 4,727.82 mi (7,608.69 km) |
| North Potomac to Castellaneta | 4,727.23 mi (7,607.74 km) |
| North Potomac to Castellanza | 4,203.62 mi (6,765.07 km) |
| North Potomac to Castellarano | 4,318.88 mi (6,950.57 km) |
| North Potomac to Castelleone | 4,250.86 mi (6,841.11 km) |
