| Potomac to Campodarsego | 4,337.50 mi (6,980.53 km) |
| Potomac to Campogalliano | 4,319.36 mi (6,951.34 km) |
| Potomac to Campolongo Maggiore | 4,348.76 mi (6,998.65 km) |
| Potomac to Camponogara | 4,347.78 mi (6,997.07 km) |
| Potomac to Camposampiero | 4,335.96 mi (6,978.05 km) |
| Potomac to Canegrate | 4,208.18 mi (6,772.40 km) |
| Potomac to Canelli | 4,207.50 mi (6,771.32 km) |
| Potomac to Canicatti | 4,714.56 mi (7,587.36 km) |
| Potomac to Canosa di Puglia | 4,668.68 mi (7,513.52 km) |
| Potomac to Cantu | 4,211.43 mi (6,777.64 km) |
| Potomac to Caorle | 4,374.88 mi (7,040.68 km) |
| Potomac to Capaci | 4,656.23 mi (7,493.48 km) |
| Potomac to Capannori | 4,335.05 mi (6,976.58 km) |
| Potomac to Capena | 4,480.49 mi (7,210.65 km) |
| Potomac to Capo d'Orlando | 4,725.19 mi (7,604.46 km) |
