| Potomac to Casamassima | 4,715.81 mi (7,589.37 km) |
| Potomac to Casandrino | 4,599.46 mi (7,402.11 km) |
| Potomac to Casapulla | 4,596.02 mi (7,396.58 km) |
| Potomac to Casarano | 4,806.30 mi (7,735.00 km) |
| Potomac to Casatenovo | 4,220.18 mi (6,791.72 km) |
| Potomac to Casciana Terme | 4,348.20 mi (6,997.74 km) |
| Potomac to Cascina | 4,339.93 mi (6,984.45 km) |
| Potomac to Caselle Torinese | 4,164.94 mi (6,702.83 km) |
| Potomac to Caserta | 4,598.23 mi (7,400.13 km) |
| Potomac to Casier | 4,348.63 mi (6,998.44 km) |
| Potomac to Casorate Primo | 4,219.75 mi (6,791.04 km) |
| Potomac to Casoria | 4,602.89 mi (7,407.64 km) |
| Potomac to Cassano al Ionio | 4,733.96 mi (7,618.58 km) |
| Potomac to Cassano d'Adda | 4,234.25 mi (6,814.37 km) |
| Potomac to Cassano delle Murge | 4,711.82 mi (7,582.93 km) |
