| Gaithersburg to Carmignano | 4,351.66 mi (7,003.32 km) |
| Gaithersburg to Carovigno | 4,753.96 mi (7,650.76 km) |
| Gaithersburg to Carpenedolo | 4,274.63 mi (6,879.35 km) |
| Gaithersburg to Carpi | 4,313.26 mi (6,941.53 km) |
| Gaithersburg to Carrara | 4,303.01 mi (6,925.02 km) |
| Gaithersburg to Carugate | 4,221.65 mi (6,794.09 km) |
| Gaithersburg to Casal di Principe | 4,587.34 mi (7,382.61 km) |
| Gaithersburg to Casale Monferrato | 4,197.38 mi (6,755.02 km) |
| Gaithersburg to Casale sul Sile | 4,347.36 mi (6,996.40 km) |
| Gaithersburg to Casalecchio di Reno | 4,340.54 mi (6,985.43 km) |
| Gaithersburg to Casalgrande | 4,313.52 mi (6,941.94 km) |
| Gaithersburg to Casalmaggiore | 4,286.42 mi (6,898.33 km) |
| Gaithersburg to Casalnuovo di Napoli | 4,600.59 mi (7,403.93 km) |
| Gaithersburg to Casalpusterlengo | 4,247.30 mi (6,835.36 km) |
| Gaithersburg to Casaluce | 4,590.89 mi (7,388.33 km) |
